update build tag

release v1.4.6
fix: fix issue #275
2026-02-04 21:02:27 +08:00 · 2024-12-04 19:07:58 +08:00 · 2024-12-04 19:02:07 +08:00 · 2024-12-04 16:37:46 +08:00 · 2024-12-04 10:42:55 +08:00 · 2024-12-04 10:40:18 +08:00
131 changed files with 25770 additions and 10885 deletions
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -17,7 +17,7 @@ jobs:
          fetch-depth: 2
      - uses: actions/setup-go@v2
        with:
-          go-version: "1.18"
+          go-version: "1.16"
      - name: Run coverage
        run: go test -v ./... -coverprofile=coverage.txt -covermode=atomic
      - name: Upload coverage to Codecov
--- a/.gitignore
+++ b/.gitignore
@@ -5,5 +5,9 @@ cryptor/*.txt
 fileutil/*.txt
 fileutil/*.zip
 fileutil/*.link
+fileutil/tempdir
 fileutil/unzip/*
-cryptor/*.pem
+slice/testdata/*
+cryptor/*.pem
+docs/node_modules
+docs/.vitepress
--- a/README.md
+++ b/README.md
@@ -3,13 +3,13 @@

 <br/>

-![Go version](https://img.shields.io/badge/go-%3E%3D1.16<recommend>-9cf)
-[![Release](https://img.shields.io/badge/release-2.0.0-green.svg)](https://github.com/duke-git/lancet/releases)
-[![GoDoc](https://godoc.org/github.com/duke-git/lancet/v2?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet/v2)
-[![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet/v2)](https://goreportcard.com/report/github.com/duke-git/lancet/v2)
+![Go version](https://img.shields.io/badge/go-v1.16-9cf)
+[![Release](https://img.shields.io/badge/release-1.4.6-green.svg)](https://github.com/duke-git/lancet/releases)
+[![GoDoc](https://godoc.org/github.com//duke-git/lancet?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet)
+[![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet)](https://goreportcard.com/report/github.com/duke-git/lancet)
 [![test](https://github.com/duke-git/lancet/actions/workflows/codecov.yml/badge.svg?branch=main&event=push)](https://github.com/duke-git/lancet/actions/workflows/codecov.yml)
 [![codecov](https://codecov.io/gh/duke-git/lancet/branch/main/graph/badge.svg?token=FC48T1F078)](https://codecov.io/gh/duke-git/lancet)
-[![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/duke-git/lancet/blob/main/LICENSE)
+[![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/duke-git/lancet/blob/v1/LICENSE)

 </div>

@@ -23,22 +23,15 @@ English | [简体中文](./README_zh-CN.md)

 ## Feature

- 👏 Comprehensive, efficient and reusable.
- 💪 250+ go util functions, support string, slice, datetime, net, crypt...
- 💅 Only depend on the go standard library.
- 🌍 Unit test for every exported function.
+-   👏 Comprehensive, efficient and reusable.
+-   💪 400+ go util functions, support string, slice, datetime, net, crypt...
+-   💅 Only depend on the go standard library.
+-   🌍 Unit test for every exported function.

 ## Installation
-### Note:

-1. <b>For users who use go1.18 and above, it is recommended to install lancet v2.x.x. Cause v2.x.x rewrite all functions with generics of go1.18.</b>
 ```go
-go get github.com/duke-git/lancet/v2 // will install latest version of v2.x.x
-```
-
-2. <b>For users who use version below go1.18, you should install v1.x.x. now latest v1 is v1.2.6. </b>
-```go
-go get github.com/duke-git/lancet@v1.2.6 // below go1.18, install latest version of v1.x.x
+go get github.com/duke-git/lancet
 ```

 ## Usage
@@ -46,12 +39,12 @@ go get github.com/duke-git/lancet@v1.2.6 // below go1.18, install latest version
 Lancet organizes the code into package structure, and you need to import the corresponding package name when use it. For example, if you use string-related functions,import the strutil package like below:

 ```go
-import "github.com/duke-git/lancet/v2/strutil"
+import "github.com/duke-git/lancet/strutil"
 ```

 ## Example

-Here takes the string function ReverseStr (reverse order string) as an example, and the strutil package needs to be imported.
+Here takes the string function Reverse (reverse order string) as an example, and the strutil package needs to be imported.

 ```go
 package main
@@ -63,349 +56,506 @@ import (

 func main() {
    s := "hello"
-    rs := strutil.ReverseStr(s)
+    rs := strutil.Reverse(s)
    fmt.Println(rs) //olleh
 }
 ```

 ## API Documentation

-### Algorithm package implements some basic algorithm. eg. sort, search.
+### 1. Compare package provides a lightweight comparison function on any type.

 ```go
-import "github.com/duke-git/lancet/v2/algorithm"
-```
-#### Function list:
- [BubbleSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#BubbleSort)
- [CountSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#CountSort)
- [HeapSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#HeapSort)
- [InsertionSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#InsertionSort)
- [MergeSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#MergeSort)
- [QuickSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#QuickSort)
- [SelectionSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#SelectionSort)
- [ShellSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#ShellSort)
- [BinarySearch](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#BinarySearch)
- [BinaryIterativeSearch](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#BinaryIterativeSearch)
- [LinearSearch](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#LinearSearch)
- [LRUCache](https://github.com/duke-git/lancet/blob/main/docs/algorithm.md#LRUCache)
-
-
-### Convertor package contains some functions for data convertion.
-
-```go
-import "github.com/duke-git/lancet/v2/convertor"
-```
-#### Function list:
- [ColorHexToRGB](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ColorHexToRGB)
- [ColorRGBToHex](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ColorRGBToHex)
- [ToBool](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToBool)
- [ToBytes](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToBytes)
- [ToChar](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToChar)
- [ToInt](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToInt)
- [ToJson](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToJson)
- [ToString](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#ToString)
- [StructToMap](https://github.com/duke-git/lancet/blob/main/docs/convertor.md#StructToMap)
-  
-### Cryptor package is for data encryption and decryption.
-
-```go
-import "github.com/duke-git/lancet/v2/cryptor"
+import "github.com/duke-git/lancet/compare"
 ```

 #### Function list:
- [AesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesEcbEncrypt)
- [AesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesEcbDecrypt)
- [AesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCbcEncrypt)
- [AesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCbcDecrypt)
- [AesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCtrCrypt)
- [AesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCfbEncrypt)
- [AesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesCfbDecrypt)
- [AesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesOfbEncrypt)
- [AesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#AesOfbDecrypt)
- [Base64StdEncode](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Base64StdEncode)
- [Base64StdDecode](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Base64StdDecode)
- [DesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesEcbEncrypt)
- [DesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesEcbDecrypt)
- [DesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCbcEncrypt)
- [DesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCbcDecrypt)
- [DesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCtrCrypt)
- [DesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCfbEncrypt)
- [DesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesCfbDecrypt)
- [DesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesOfbEncrypt)
- [DesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#DesOfbDecrypt)
- [HmacMd5](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacMd5)
- [HmacSha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacSha1)
- [HmacSha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacSha256)
- [HmacSha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#HmacSha512)
- [Md5String](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Md5String)
- [Md5File](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Md5File)
- [Sha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Sha1)
- [Sha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Sha256)
- [Sha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#Sha512)
- [GenerateRsaKey](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#GenerateRsaKey)
- [RsaEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#RsaEncrypt)
- [RsaDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor.md#RsaDecrypt)

-### Datetime package supports date and time format and compare.
+-   [Equal](https://github.com/duke-git/lancet/blob/v1/docs/compare.md#Equal)
+-   [EqualValue](https://github.com/duke-git/lancet/blob/v1/docs/compare.md#EqualValue)
+-   [LessThan](https://github.com/duke-git/lancet/blob/v1/docs/compare.md#LessThan)
+-   [GreaterThan](https://github.com/duke-git/lancet/blob/v1/docs/compare.md#GreaterThan)
+-   [LessOrEqual](https://github.com/duke-git/lancet/blob/v1/docs/compare.md#LessOrEqual)
+-   [GreaterOrEqual](https://github.com/duke-git/lancet/blob/v1/docs/compare.md#GreaterOrEqual)

+### 2. Convertor package contains some functions for data convertion.

 ```go
-import "github.com/duke-git/lancet/v2/datetime"
+import "github.com/duke-git/lancet/convertor"
 ```
-#### Function list:
- [AddDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#AddDay)
- [AddHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#AddHour)
- [AddMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#AddMinute)
- [BeginOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMinute)
- [BeginOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfHour)
- [BeginOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfDay)
- [BeginOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfWeek)
- [BeginOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMonth)
- [BeginOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfYear)
- [EndOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMinute)
- [EndOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfHour)
- [EndOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfDay)
- [EndOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfWeek)
- [EndOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMonth)
- [EndOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfYear)
- [GetNowDate](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNowDate)
- [GetNowTime](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNowTime)
- [GetNowDateTime](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNowDateTime)
- [GetZeroHourTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetZeroHourTimestamp)
- [GetNightTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#GetNightTimestamp)
- [FormatTimeToStr](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#FormatTimeToStr)
- [FormatStrToTime](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#FormatStrToTime)

-### Fileutil package implements some basic functions for file operations.
+#### Function list:
+
+-   [ColorHexToRGB](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ColorHexToRGB)
+-   [ColorRGBToHex](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ColorRGBToHex)
+-   [ToBool](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToBool)
+-   [ToBytes](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToBytes)
+-   [ToChar](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToChar)
+-   [ToChannel](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToChannel)
+-   [ToInt](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToInt)
+-   [ToJson](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToJson)
+-   [ToString](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToString)
+-   [StructToMap](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#StructToMap)
+-   [MapToStruct](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#MapToStruct)
+-   [EncodeByte](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#EncodeByte)
+-   [DecodeByte](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#DecodeByte)
+-   [DeepClone](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#DeepClone)
+-   [CopyProperties](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#CopyProperties)
+-   [ToInterface](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToInterface)
+-   [Utf8ToGbk](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#Utf8ToGbk)
+-   [GbkToUtf8](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#GbkToUtf8)
+-   [ToStdBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToStdBase64)
+-   [ToUrlBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToUrlBase64)
+-   [ToRawStdBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToRawStdBase64)
+-   [ToRawUrlBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToRawUrlBase64)
+-   [ToBigInt](https://github.com/duke-git/lancet/blob/v1/docs/convertor.md#ToBigInt)
+
+### 3. Cryptor package is for data encryption and decryption.

 ```go
-import "github.com/duke-git/lancet/v2/fileutil"
+import "github.com/duke-git/lancet/cryptor"
+```
+
+#### Function list:
+
+-   [AesEcbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesEcbEncrypt)
+-   [AesEcbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesEcbDecrypt)
+-   [AesCbcEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesCbcEncrypt)
+-   [AesCbcDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesCbcDecrypt)
+-   [AesCtrCrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesCtrCrypt)
+-   [AesCfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesCfbEncrypt)
+-   [AesCfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesCfbDecrypt)
+-   [AesOfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesOfbEncrypt)
+-   [AesOfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#AesOfbDecrypt)
+-   [Base64StdEncode](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Base64StdEncode)
+-   [Base64StdDecode](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Base64StdDecode)
+-   [DesEcbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesEcbEncrypt)
+-   [DesEcbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesEcbDecrypt)
+-   [DesCbcEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesCbcEncrypt)
+-   [DesCbcDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesCbcDecrypt)
+-   [DesCtrCrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesCtrCrypt)
+-   [DesCfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesCfbEncrypt)
+-   [DesCfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesCfbDecrypt)
+-   [DesOfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesOfbEncrypt)
+-   [DesOfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#DesOfbDecrypt)
+-   [HmacMd5](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacMd5)
+-   [HmacMd5WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacMd5WithBase64)
+-   [HmacSha1](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacSha1)
+-   [HmacSha1WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacSha1WithBase64)
+-   [HmacSha256](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacSha256)
+-   [HmacSha256WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacSha256WithBase64)
+-   [HmacSha512](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacSha512)
+-   [HmacSha512WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacSha512WithBase64)
+-   [Md5String](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Md5String)
+-   [Md5StringWithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Md5StringWithBase64)
+-   [Md5Byte](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Md5Byte)
+-   [Md5ByteWithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Md5ByteWithBase64)
+-   [Md5File](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Md5File)
+-   [Sha1](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Sha1)
+-   [Sha1WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Sha1WithBase64)
+-   [Sha256](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Sha256)
+-   [Sha256WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Sha256WithBase64)
+-   [Sha512](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Sha512)
+-   [Sha512WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#Sha512WithBase64)
+-   [GenerateRsaKey](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#GenerateRsaKey)
+-   [RsaEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#RsaEncrypt)
+-   [RsaDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#RsaDecrypt)
+-   [GenerateRsaKeyPair](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#GenerateRsaKeyPair)
+-   [RsaEncryptOAEP](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#RsaEncryptOAEP)
+-   [RsaDecryptOAEP](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#RsaDecryptOAEP)
+### 4. Datetime package supports date and time format and compare.
+
+```go
+import "github.com/duke-git/lancet/datetime"
+```
+
+#### Function list:
+
+-   [AddDay](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#AddDay)
+-   [AddHour](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#AddHour)
+-   [AddMinute](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#AddMinute)
+-   [AddYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#AddYear)
+-   [BeginOfMinute](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfMinute)
+-   [BeginOfHour](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfHour)
+-   [BeginOfDay](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfDay)
+-   [BeginOfWeek](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfWeek)
+-   [BeginOfMonth](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfMonth)
+-   [BeginOfYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfYear)
+-   [EndOfMinute](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfMinute)
+-   [EndOfHour](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfHour)
+-   [EndOfDay](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfDay)
+-   [EndOfWeek](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfWeek)
+-   [EndOfMonth](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfMonth)
+-   [EndOfYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfYear)
+-   [GetNowDate](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#GetNowDate)
+-   [GetNowTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#GetNowTime)
+-   [GetNowDateTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#GetNowDateTime)
+-   [GetZeroHourTimestamp](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#GetZeroHourTimestamp)
+-   [GetNightTimestamp](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#GetNightTimestamp)
+-   [FormatTimeToStr](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#FormatTimeToStr)
+-   [FormatStrToTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#FormatStrToTime)
+-   [NewUnix](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#NewUnix)
+-   [NewUnixNow](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#NewUnixNow)
+-   [NewFormat](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#NewFormat)
+-   [NewISO8601](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#NewISO8601)
+-   [ToUnix](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#ToUnix)
+-   [ToFormat](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#ToFormat)
+-   [ToFormatForTpl](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#ToFormatForTpl)
+-   [ToIso8601](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#ToIso8601)
+-   [IsLeapYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#IsLeapYear)
+-   [BetweenSeconds](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BetweenSeconds)
+-   [DayOfYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#DayOfYear)
+-   [IsWeekend](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#IsWeekend)
+-   [NowDateOrTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#NowDateOrTime)
+-   [Timestamp](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#Timestamp)
+-   [TimestampMilli](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#TimestampMilli)
+-   [TimestampMicro](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#TimestampMicro)
+-   [TimestampNano](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#TimestampNano)
+-   [TrackFuncTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#TrackFuncTime)
+-   [DaysBetween](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#DaysBetween)
+-   [GenerateDatetimesBetween](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#GenerateDatetimesBetween)
+
+### 5. Fileutil package implements some basic functions for file operations.
+
+```go
+import "github.com/duke-git/lancet/fileutil"
 ```

 #### Function list：

- [ClearFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#ClearFile)
- [CreateFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#CreateFile)
- [CopyFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#CopyFile)
- [FileMode](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#FileMode)
- [MiMeType](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#MiMeType)
- [IsExist](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#IsExist)
- [IsLink](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#IsLink)
- [IsDir](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#IsDir)
- [ListFileNames](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#ListFileNames)
- [RemoveFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#RemoveFile)
- [ReadFileToString](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#ReadFileToString)
- [ReadFileByLine](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#ReadFileByLine)
- [Zip](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#Zip)
- [UnZip](https://github.com/duke-git/lancet/blob/main/docs/fileutil.md#UnZip)
+-   [ClearFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#ClearFile)
+-   [CreateFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#CreateFile)
+-   [CreateDir](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#CreateDir)
+-   [CopyFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#CopyFile)
+-   [FileMode](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#FileMode)
+-   [MiMeType](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#MiMeType)
+-   [IsExist](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#IsExist)
+-   [IsLink](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#IsLink)
+-   [IsDir](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#IsDir)
+-   [ListFileNames](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#ListFileNames)
+-   [RemoveFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#RemoveFile)
+-   [ReadFileToString](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#ReadFileToString)
+-   [ReadFileByLine](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#ReadFileByLine)
+-   [Zip](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#Zip)
+-   [ZipAppendEntry](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#ZipAppendEntry)
+-   [UnZip](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#UnZip)
+-   [CurrentPath](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#CurrentPath)
+-   [IsZipFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#IsZipFile)
+-   [FileSize](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#FileSize)
+-   [MTime](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#MTime)
+-   [Sha](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#Sha)
+-   [ReadCsvFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#ReadCsvFile)
+-   [WriteCsvFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#WriteCsvFile)
+-   [WriteMapsToCsv](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#WriteMapsToCsv)
+-   [WriteStringToFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#WriteStringToFile)
+-   [WriteBytesToFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#WriteBytesToFile)
+-   [ReadFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil.md#ReadFile)

-### Formatter contains some functions for data formatting.
+### 6. Formatter contains some functions for data formatting.

 ```go
-import "github.com/duke-git/lancet/v2/formatter"
-```
-#### Function list:
- [Comma](https://github.com/duke-git/lancet/blob/main/docs/formatter.md#Comma)
-
-### Function package can control the flow of function execution and support part of functional programming
-
-```go
-import "github.com/duke-git/lancet/v2/function"
-```
-
-#### Function list:
- [After](https://github.com/duke-git/lancet/blob/main/docs/function.md#After)
- [Before](https://github.com/duke-git/lancet/blob/main/docs/function.md#Before)
- [Curry](https://github.com/duke-git/lancet/blob/main/docs/function.md#Curry)
- [Compose](https://github.com/duke-git/lancet/blob/main/docs/function.md#Compose)
- [Debounced](https://github.com/duke-git/lancet/blob/main/docs/function.md#Debounced)
- [Delay](https://github.com/duke-git/lancet/blob/main/docs/function.md#Delay)
- [Watcher](https://github.com/duke-git/lancet/blob/main/docs/function.md#Watcher)
-
-
-### Mathutil package implements some functions for math calculation.
-
-```go
-import "github.com/duke-git/lancet/v2/mathutil"
-```
-
-#### Function list:
- [Exponent](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Exponent)
- [Fibonacci](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Fibonacci)
- [Factorial](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Factorial)
- [Percent](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#Percent)
- [RoundToFloat](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#RoundToFloat)
- [RoundToString](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#RoundToString)
- [TruncRound](https://github.com/duke-git/lancet/blob/main/docs/mathutil.md#TruncRound)
-
-
-### Netutil package contains functions to get net information and send http request.
-
-```go
-import "github.com/duke-git/lancet/v2/netutil"
-```
-
-#### Function list:
- [ConvertMapToQueryString](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#ConvertMapToQueryString)
- [GetInternalIp](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetInternalIp)
- [GetIps](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetIps)
- [GetMacAddrs](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetMacAddrs)
- [GetPublicIpInfo](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetPublicIpInfo)
- [IsPublicIP](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#IsPublicIP)
- [HttpGet](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpGet)
- [HttpDelete](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpDelete)
- [HttpPost](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpPost)
- [HttpPut](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpPut)
- [HttpPatch](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#HttpPatch)
- [ParseHttpResponse](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#ParseHttpResponse)
-
-### Random package implements some basic functions to generate random int and string.
-
-```go
-import "github.com/duke-git/lancet/v2/random"
-```
-
-#### Function list:
- [RandBytes](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandBytes)
- [RandInt](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandInt)
- [RandString](https://github.com/duke-git/lancet/blob/main/docs/random.md#RandString)
- [UUIdV4](https://github.com/duke-git/lancet/blob/main/docs/random.md#UUIdV4)
-
-### Retry package is for executing a function repeatedly until it was successful or canceled by the context.
-
-```go
-import "github.com/duke-git/lancet/v2/retry"
-```
-
-#### Function list:
- [Context](https://github.com/duke-git/lancet/blob/main/docs/retry.md#Context)
- [Retry](https://github.com/duke-git/lancet/blob/main/docs/retry.md#Retry)
- [RetryFunc](https://github.com/duke-git/lancet/blob/main/docs/retry.md#RetryFunc)
- [RetryDuration](https://github.com/duke-git/lancet/blob/main/docs/retry.md#RetryDuration)
- [RetryTimes](https://github.com/duke-git/lancet/blob/main/docs/retry.md#RetryTimes)
-
-### Slice contains some functions to manipulate slice.
-
-```go
-import "github.com/duke-git/lancet/v2/slice"
-```
-
-#### Function list:
- [Contain](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Contain)
- [ContainSubSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ContainSubSlice)
- [Chunk](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Chunk)
- [Compact](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Compact)
- [Concat](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Concat)
- [Count](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Count)
- [Difference](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Difference)
- [DifferenceBy](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DifferenceBy)
- [DifferenceWith](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DifferenceWith)
- [DeleteAt](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DeleteAt)
- [Drop](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Drop)
- [Every](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Every)
- [Filter](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Filter)
- [Find](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Find)
- [FindLast](https://github.com/duke-git/lancet/blob/main/docs/slice.md#FindLast)
- [FlattenDeep](#FlattenDeep)
- [ForEach](https://github.com/duke-git/lancet/blob/main/docs/slice.md#ForEach)
- [GroupBy](https://github.com/duke-git/lancet/blob/main/docs/slice.md#GroupBy)
- [IntSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#IntSlice)
- [InterfaceSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#InterfaceSlice)
- [Intersection](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Intersection)
- [InsertAt](https://github.com/duke-git/lancet/blob/main/docs/slice.md#InsertAt)
- [Map](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Map)
- [Reverse](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Reverse)
- [Reduce](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Reduce)
- [Shuffle](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Shuffle)
- [SortByField](https://github.com/duke-git/lancet/blob/main/docs/slice.md#SortByField)
- [Some](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Some)
- [StringSlice](https://github.com/duke-git/lancet/blob/main/docs/slice.md#StringSlice)
- [Unique](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Unique)
- [Union](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Union)
- [UpdateAt](https://github.com/duke-git/lancet/blob/main/docs/slice.md#UpdateAt)
- [Without](https://github.com/duke-git/lancet/blob/main/docs/slice.md#Without)
-
-### Strutil package contains some functions to manipulate string.
-```go
-import "github.com/duke-git/lancet/v2/strutil"
+import "github.com/duke-git/lancet/formatter"
 ```

 #### Function list:

- [After](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#After)
- [AfterLast](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#AfterLast)
- [Before](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Before)
- [BeforeLast](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#BeforeLast)
- [CamelCase](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#CamelCase)
- [Capitalize](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Capitalize)
- [IsString](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#IsString)
- [KebabCase](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#KebabCase)
- [LowerFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#LowerFirst)
- [UpperFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#UpperFirst)
- [PadEnd](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#PadEnd)
- [PadStart](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#PadStart)
- [ReverseStr](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#ReverseStr)
- [SnakeCase](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#SnakeCase)
- [Wrap](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Wrap)
- [Unwrap](https://github.com/duke-git/lancet/blob/main/docs/strutil.md#Unwrap)
-  
-### System package contain some functions about os, runtime, shell command.
+-   [Comma](https://github.com/duke-git/lancet/blob/v1/docs/formatter.md#Comma)
+-   [Pretty](https://github.com/duke-git/lancet/blob/v1/docs/formatter.md#Pretty)
+-   [PrettyToWriter](https://github.com/duke-git/lancet/blob/v1/docs/formatter.md#PrettyToWriter)
+-   [DecimalBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter.md#DecimalBytes)
+-   [BinaryBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter.md#BinaryBytes)
+-   [ParseDecimalBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter.md#ParseDecimalBytes)
+-   [ParseBinaryBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter.md#ParseBinaryBytes)
+
+### 7. Function package can control the flow of function execution and support part of functional programming

 ```go
-import "github.com/duke-git/lancet/v2/system"
-```
-#### Function list:
- [IsWindows](https://github.com/duke-git/lancet/blob/main/docs/system.md#IsWindows)
- [IsLinux](https://github.com/duke-git/lancet/blob/main/docs/system.md#IsLinux)
- [IsMac](https://github.com/duke-git/lancet/blob/main/docs/system.md#IsMac)
- [GetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#GetOsEnv)
- [SetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#SetOsEnv)
- [RemoveOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#RemoveOsEnv)
- [CompareOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system.md#CompareOsEnv)
- [ExecCommand](https://github.com/duke-git/lancet/blob/main/docs/system.md#ExecCommand)
-
-### Validator package contains some functions for data validation.
-
-```go
-import "github.com/duke-git/lancet/v2/validator"
+import "github.com/duke-git/lancet/function"
 ```

 #### Function list:

- [ContainChinese](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainChinese)
- [ContainLetter](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainLetter)
- [ContainLower](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainLower)
- [ContainUpper](https://github.com/duke-git/lancet/blob/main/docs/validator.md#ContainUpper)
- [IsAlpha](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsAlpha)
- [IsAllUpper](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsAllUpper)
- [IsAllLower](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsAllLower)
- [IsBase64](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsBase64)
- [IsChineseMobile](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsChineseMobile)
- [IsChineseIdNum](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsChineseIdNum)
- [IsChinesePhone](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsChinesePhone)
- [IsCreditCard](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsCreditCard)
- [IsDns](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsDns)
- [IsEmail](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsEmail)
- [IsEmptyString](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsEmptyString)
- [IsFloatStr](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsFloatStr)
- [IsNumberStr](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsNumberStr)
- [IsJSON](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsJSON)
- [IsRegexMatch](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsRegexMatch)
- [IsIntStr](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIntStr)
- [IsIp](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIp)
- [IsIpV4](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIpV4)
- [IsIpV6](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsIpV6)
- [IsStrongPassword](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsStrongPassword)
- [IsUrl](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsUrl)
- [IsWeakPassword](https://github.com/duke-git/lancet/blob/main/docs/validator.md#IsWeakPassword)
-### xerror package implements helpers for errors.
+-   [After](https://github.com/duke-git/lancet/blob/v1/docs/function.md#After)
+-   [Before](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Before)
+-   [Curry](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Curry)
+-   [Compose](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Compose)
+-   [Debounced](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Debounced)
+-   [Debounce](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Debounce)
+-   [Throttle](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Throttle)
+-   [Delay](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Delay)
+-   [Pipeline](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Pipeline)
+-   [Schedule](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Schedule)
+-   [Watcher](https://github.com/duke-git/lancet/blob/v1/docs/function.md#Watcher)
+
+### 8. Mathutil package implements some functions for math calculation.

 ```go
-import "github.com/duke-git/lancet/v2/xerror"
+import "github.com/duke-git/lancet/mathutil"
 ```
+
 #### Function list:
- [Unwrap](https://github.com/duke-git/lancet/blob/main/docs/xerror.md#Unwrap)
-  
+
+-   [Exponent](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#Exponent)
+-   [Fibonacci](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#Fibonacci)
+-   [Factorial](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#Factorial)
+-   [Percent](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#Percent)
+-   [RoundToFloat](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#RoundToFloat)
+-   [RoundToString](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#RoundToString)
+-   [TruncRound](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#TruncRound)
+-   [CeilToFloat](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#CeilToFloat)
+-   [CeilToString](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#CeilToString)
+-   [FloorToFloat](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#FloorToFloat)
+-   [FloorToString](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#FloorToString)
+-   [AngleToRadian](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#AngleToRadian)
+-   [RadianToAngle](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#RadianToAngle)
+-   [PointDistance](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#PointDistance)
+-   [IsPrime](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#IsPrime)
+-   [GCD](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#GCD)
+-   [LCM](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#LCM)
+-   [Cos](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#Cos)
+-   [Sin](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#Sin)
+-   [Log](https://github.com/duke-git/lancet/blob/v1/docs/mathutil.md#Log)
+
+### 9. Netutil package contains functions to get net information and send http request.
+
+```go
+import "github.com/duke-git/lancet/netutil"
+```
+
+#### Function list:
+
+-   [ConvertMapToQueryString](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#ConvertMapToQueryString)
+-   [EncodeUrl](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#EncodeUrl)
+-   [GetInternalIp](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#GetInternalIp)
+-   [GetIps](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#GetIps)
+-   [GetMacAddrs](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#GetMacAddrs)
+-   [GetPublicIpInfo](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#GetPublicIpInfo)
+-   [GetRequestPublicIp](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#GetRequestPublicIp)
+-   [IsPublicIP](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#IsPublicIP)
+-   [IsInternalIP](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#IsInternalIP)
+-   [HttpGet](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#HttpGet)
+-   [HttpDelete](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#HttpDelete)
+-   [HttpPost](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#HttpPost)
+-   [HttpPut](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#HttpPut)
+-   [HttpPatch](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#HttpPatch)
+-   [ParseHttpResponse](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#ParseHttpResponse)
+-   [UploadFile](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#UploadFile)
+-   [DownloadFile](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#DownloadFile)
+-   [IsPingConnected](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#IsPingConnected)
+-   [IsTelnetConnected](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#IsTelnetConnected)
+
+### 10. Random package implements some basic functions to generate random int and string.
+
+```go
+import "github.com/duke-git/lancet/random"
+```
+
+#### Function list:
+
+-   [RandBool](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandBool)
+-   [RandBoolSlice](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandBoolSlice)
+-   [RandBytes](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandBytes)
+-   [RandInt](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandInt)
+-   [RandIntSlice](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandIntSlice)
+-   [RandString](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandString)
+-   [RandStringSlice](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandStringSlice)
+-   [RandFloat](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandFloat)
+-   [RandFloats](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandFloats)
+-   [RandUpper](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandUpper)
+-   [RandLower](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandLower)
+-   [RandNumeral](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandNumeral)
+-   [RandNumeralOrLetter](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandNumeralOrLetter)
+-   [UUIdV4](https://github.com/duke-git/lancet/blob/v1/docs/random.md#UUIdV4)
+-   [RandUniqueIntSlice](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandUniqueIntSlice)
+
+### 11. Retry package is for executing a function repeatedly until it was successful or canceled by the context.
+
+```go
+import "github.com/duke-git/lancet/retry"
+```
+
+#### Function list:
+
+-   [Context](https://github.com/duke-git/lancet/blob/v1/docs/retry.md#Context)
+-   [Retry](https://github.com/duke-git/lancet/blob/v1/docs/retry.md#Retry)
+-   [RetryFunc](https://github.com/duke-git/lancet/blob/v1/docs/retry.md#RetryFunc)
+-   [RetryDuration](https://github.com/duke-git/lancet/blob/v1/docs/retry.md#RetryDuration)
+-   [RetryTimes](https://github.com/duke-git/lancet/blob/v1/docs/retry.md#RetryTimes)
+
+### 12. Slice contains some functions to manipulate slice.
+
+```go
+import "github.com/duke-git/lancet/slice"
+```
+
+#### Function list:
+
+-   [AppendIfAbsent](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#AppendIfAbsent)
+-   [Contain](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Contain)
+-   [ContainSubSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#ContainSubSlice)
+-   [Chunk](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Chunk)
+-   [Compact](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Compact)
+-   [Concat](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Concat)
+-   [Count](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Count)
+-   [Difference](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Difference)
+-   [DifferenceBy](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#DifferenceBy)
+-   [DeleteByIndex](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#DeleteByIndex)
+-   [Drop](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Drop)
+-   [Every](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Every)
+-   [Equal](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Equal)
+-   [EqualWith](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#EqualWith)
+-   [Filter](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Filter)
+-   [Find](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Find)
+-   [FindLast](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#FindLast)
+-   [FlattenDeep](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#FlattenDeep)
+-   [ForEach](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#ForEach)
+-   [GroupBy](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#GroupBy)
+-   [IntSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#IntSlice)
+-   [IndexOf](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#IndexOf)
+-   [LastIndexOf](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#LastIndexOf)
+-   [InterfaceSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#InterfaceSlice)
+-   [Intersection](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Intersection)
+-   [InsertByIndex](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#InsertByIndex)
+-   [Map](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Map)
+-   [ReverseSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#ReverseSlice)
+-   [Reduce](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Reduce)
+-   [Shuffle](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Shuffle)
+-   [SortByField](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#SortByField)
+-   [Some](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Some)
+-   [StringSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#StringSlice)
+-   [ToSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#ToSlice)
+-   [ToSlicePointer](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#ToSlice)
+-   [Unique](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Unique)
+-   [UniqueBy](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#UniqueBy)
+-   [Union](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Union)
+-   [UpdateByIndex](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#UpdateByIndex)
+-   [Without](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Without)
+-   [Join](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#Join)
+
+### 13. Strutil package contains some functions to manipulate string.
+
+```go
+import "github.com/duke-git/lancet/strutil"
+```
+
+#### Function list:
+
+-   [After](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#After)
+-   [AfterLast](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#AfterLast)
+-   [Before](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Before)
+-   [BeforeLast](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#BeforeLast)
+-   [CamelCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#CamelCase)
+-   [Capitalize](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Capitalize)
+-   [ContainsAll](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#ContainsAll)
+-   [ContainsAny](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#ContainsAny)
+-   [IsString](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#IsString)
+-   [KebabCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#KebabCase)
+-   [UpperKebabCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#UpperKebabCase)
+-   [LowerFirst](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#LowerFirst)
+-   [UpperFirst](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#UpperFirst)
+-   [Pad](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Pad)
+-   [PadEnd](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#PadEnd)
+-   [PadStart](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#PadStart)
+-   [Reverse](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Reverse)
+-   [SnakeCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#SnakeCase)
+-   [UpperSnakeCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#UpperSnakeCase)
+-   [SplitEx](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#SplitEx)
+-   [Wrap](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Wrap)
+-   [Unwrap](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Unwrap)
+-   [SplitWords](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#SplitWords)
+-   [WordCount](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#WordCount)
+-   [RemoveNonPrintable](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#RemoveNonPrintable)
+-   [StringToBytes](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#StringToBytes)
+-   [BytesToString](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#BytesToString)
+-   [IsBlank](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#IsBlank)
+-   [HasPrefixAny](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#HasPrefixAny)
+-   [HasSuffixAny](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#HasSuffixAny)
+-   [IndexOffset](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#IndexOffset)
+-   [ReplaceWithMap](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#ReplaceWithMap)
+-   [Trim](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Trim)
+-   [SplitAndTrim](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#SplitAndTrim)
+-   [HideString](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#HideString)
+-   [RemoveWhiteSpace](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#RemoveWhiteSpace)
+-   [SubInBetween](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#SubInBetween)
+-   [HammingDistance](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#HammingDistance)
+-   [Concat](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Concat)
+-   [Ellipsis](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Ellipsis)
+-   [Shuffle](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Shuffle)
+-   [Rotate](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Rotate)
+-   [TemplateReplace](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#TemplateReplace)
+-   [RegexMatchAllGroups](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#RegexMatchAllGroups)
+-   [Cut](https://github.com/duke-git/lancet/blob/v1/docs/strutil.md#Cut)
+
+
+### 14. System package contain some functions about os, runtime, shell command.
+
+```go
+import "github.com/duke-git/lancet/system"
+```
+
+#### Function list:
+
+-   [IsWindows](https://github.com/duke-git/lancet/blob/v1/docs/system.md#IsWindows)
+-   [IsLinux](https://github.com/duke-git/lancet/blob/v1/docs/system.md#IsLinux)
+-   [IsMac](https://github.com/duke-git/lancet/blob/v1/docs/system.md#IsMac)
+-   [GetOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system.md#GetOsEnv)
+-   [SetOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system.md#SetOsEnv)
+-   [RemoveOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system.md#RemoveOsEnv)
+-   [CompareOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system.md#CompareOsEnv)
+-   [ExecCommand](https://github.com/duke-git/lancet/blob/v1/docs/system.md#ExecCommand)
+-   [GetOsBits](https://github.com/duke-git/lancet/blob/v1/docs/system.md#GetOsBits)
+
+### 15. Validator package contains some functions for data validation.
+
+```go
+import "github.com/duke-git/lancet/validator"
+```
+
+#### Function list:
+
+-   [ContainChinese](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#ContainChinese)
+-   [ContainLetter](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#ContainLetter)
+-   [ContainLower](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#ContainLower)
+-   [ContainUpper](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#ContainUpper)
+-   [IsAlpha](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsAlpha)
+-   [IsAllUpper](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsAllUpper)
+-   [IsAllLower](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsAllLower)
+-   [IsBase64](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsBase64)
+-   [IsChineseMobile](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsChineseMobile)
+-   [IsChineseIdNum](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsChineseIdNum)
+-   [IsChinesePhone](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsChinesePhone)
+-   [IsCreditCard](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsCreditCard)
+-   [IsDns](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsDns)
+-   [IsEmail](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsEmail)
+-   [IsEmptyString](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsEmptyString)
+-   [IsInt](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsInt)
+-   [IsFloat](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsFloat)
+-   [IsNumber](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsNumber)
+-   [IsIntStr](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsIntStr)
+-   [IsFloatStr](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsFloatStr)
+-   [IsNumberStr](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsNumberStr)
+-   [IsJSON](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsJSON)
+-   [IsRegexMatch](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsRegexMatch)
+-   [IsIp](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsIp)
+-   [IsIpV4](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsIpV4)
+-   [IsIpV6](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsIpV6)
+-   [IsStrongPassword](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsStrongPassword)
+-   [IsUrl](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsUrl)
+-   [IsWeakPassword](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsWeakPassword)
+-   [IsZeroValue](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsZeroValue)
+-   [IsGBK](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsGBK)
+-   [IsASCII](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsASCII)
+-   [IsPrintable](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsPrintable)
+-   [IsBin](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsBin)
+-   [IsHex](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsHex)
+-   [IsBase64URL](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsBase64URL)
+-   [IsJWT](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsJWT)
+-   [IsVisa](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsVisa)
+-   [IsMasterCard](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsMasterCard)
+-   [IsAmericanExpress](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsAmericanExpress)
+-   [IsUnionPay](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsUnionPay)
+-   [IsChinaUnionPay](https://github.com/duke-git/lancet/blob/v1/docs/validator.md#IsChinaUnionPay)
+

 ## How to Contribute

--- a/README_zh-CN.md
+++ b/README_zh-CN.md
@@ -3,13 +3,13 @@

 <br/>

-![Go version](https://img.shields.io/badge/go-%3E%3D1.16<recommend>-9cf)
-[![Release](https://img.shields.io/badge/release-2.0.0-green.svg)](https://github.com/duke-git/lancet/releases)
-[![GoDoc](https://godoc.org/github.com/duke-git/lancet/v2?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet/v2)
-[![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet/v2)](https://goreportcard.com/report/github.com/duke-git/lancet/v2)
+![Go version](https://img.shields.io/badge/go-v1.16-9cf)
+[![Release](https://img.shields.io/badge/release-1.4.6-green.svg)](https://github.com/duke-git/lancet/releases)
+[![GoDoc](https://godoc.org/github.com//duke-git/lancet?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet)
+[![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet)](https://goreportcard.com/report/github.com/duke-git/lancet)
 [![test](https://github.com/duke-git/lancet/actions/workflows/codecov.yml/badge.svg?branch=main&event=push)](https://github.com/duke-git/lancet/actions/workflows/codecov.yml)
 [![codecov](https://codecov.io/gh/duke-git/lancet/branch/main/graph/badge.svg?token=FC48T1F078)](https://codecov.io/gh/duke-git/lancet)
-[![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/duke-git/lancet/blob/main/LICENSE)
+[![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/duke-git/lancet/blob/v1/LICENSE)

 </div>

@@ -20,38 +20,30 @@

 简体中文 | [English](./README.md)

-
 ## 特性

- 👏 全面、高效、可复用
- 💪 250+常用go工具函数，支持string、slice、datetime、net、crypt...
- 💅 只依赖go标准库
- 🌍 所有导出函数单元测试覆盖率100%
+-   👏 全面、高效、可复用
+-   💪 400+常用 go 工具函数，支持 string、slice、datetime、net、crypt...
+-   💅 只依赖 go 标准库
+-   🌍 所有导出函数单元测试覆盖率 100%

 ## 安装
-### Note: 
-1. <b>对于使用go1.18及以上的用户，建议安装v2.x.x。 因为v2.x.x用go1.18的泛型重写了大部分函数。</b>

 ```go
-go get github.com/duke-git/lancet/v2 //安装v2最新版本v2.x.x
-```
-
-2. <b>使用go1.18以下版本的用户，必须安装v1.x.x。目前最新的v1版本是v1.2.6。</b>
-```go
-go get github.com/duke-git/lancet@v1.2.6 // 使用go1.18以下版本, 必须安装v1.x.x版本
+go get github.com/duke-git/lancet
 ```

 ## 用法

-lancet是以包的结构组织代码的，使用时需要导入相应的包名。例如：如果使用字符串相关函数，需要导入strutil包:
+lancet 是以包的结构组织代码的，使用时需要导入相应的包名。例如：如果使用字符串相关函数，需要导入 strutil 包:

 ```go
-import "github.com/duke-git/lancet/v2/strutil"
+import "github.com/duke-git/lancet/strutil"
 ```

 ## 例子

-此处以字符串工具函数ReverseStr（逆序字符串）为例，需要导入strutil包:
+此处以字符串工具函数 Reverse（逆序字符串）为例，需要导入 strutil 包:

 ```go
 package main
@@ -63,358 +55,514 @@ import (

 func main() {
    s := "hello"
-    rs := strutil.ReverseStr(s)
+    rs := strutil.Reverse(s)
    fmt.Println(rs) //olleh
 }
 ```

-## API文档
+## API 文档

-### algorithm算法包实现一些基本算法。eg. sort, search.

+### 1. compare包提供几个轻量级的类型比较函数。
 ```go
-import "github.com/duke-git/lancet/v2/algorithm"
+import "github.com/duke-git/lancet/compare"
 ```
+
 #### Function list:
- [BubbleSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#BubbleSort)
- [CountSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#CountSort)
- [HeapSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#HeapSort)
- [InsertionSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#InsertionSort)
- [MergeSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#MergeSort)
- [QuickSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#QuickSort)
- [SelectionSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#SelectionSort)
- [ShellSort](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#ShellSort)
- [BinarySearch](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#BinarySearch)
- [BinaryIterativeSearch](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#BinaryIterativeSearch)
- [LinearSearch](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#LinearSearch)
- [LRUCache](https://github.com/duke-git/lancet/blob/main/docs/algorithm_zh-CN.md#LRUCache)

-### convertor转换器包支持一些常见的数据类型转换。
+-   [Equal](https://github.com/duke-git/lancet/blob/v1/docs/compare_zh-CN.md#Equal)
+-   [EqualValue](https://github.com/duke-git/lancet/blob/v1/docs/compare_zh-CN.md#EqualValue)
+-   [LessThan](https://github.com/duke-git/lancet/blob/v1/docs/compare_zh-CN.md#LessThan)
+-   [GreaterThan](https://github.com/duke-git/lancet/blob/v1/docs/compare_zh-CN.md#GreaterThan)
+-   [LessOrEqual](https://github.com/duke-git/lancet/blob/v1/docs/compare_zh-CN.md#LessOrEqual)
+-   [GreaterOrEqual](https://github.com/duke-git/lancet/blob/v1/docs/compare_zh-CN.md#GreaterOrEqual)
+
+### 2. convertor转换器包支持一些常见的数据类型转换。

 ```go
-import "github.com/duke-git/lancet/v2/convertor"
-```
-#### 函数列表:
- [ColorHexToRGB](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ColorHexToRGB)
- [ColorRGBToHex](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ColorRGBToHex)
- [ToBool](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToBool)
- [ToBytes](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToBytes)
- [ToChar](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToChar)
- [ToInt](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToInt)
- [ToJson](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToJson)
- [ToString](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#ToString)
- [StructToMap](https://github.com/duke-git/lancet/blob/main/docs/convertor_zh-CN.md#StructToMap)
-  
-### cryptor加密包支持数据加密和解密，获取md5，hash值。支持base64, md5, hmac, aes, des, rsa。
-
-```go
-import "github.com/duke-git/lancet/v2/cryptor"
+import "github.com/duke-git/lancet/convertor"
 ```

 #### 函数列表:
- [AesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesEcbEncrypt)
- [AesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesEcbDecrypt)
- [AesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCbcEncrypt)
- [AesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCbcDecrypt)
- [AesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCtrCrypt)
- [AesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCfbEncrypt)
- [AesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesCfbDecrypt)
- [AesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesOfbEncrypt)
- [AesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#AesOfbDecrypt)
- [Base64StdEncode](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Base64StdEncode)
- [Base64StdDecode](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Base64StdDecode)
- [DesEcbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesEcbEncrypt)
- [DesEcbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesEcbDecrypt)
- [DesCbcEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCbcEncrypt)
- [DesCbcDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCbcDecrypt)
- [DesCtrCrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCtrCrypt)
- [DesCfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCfbEncrypt)
- [DesCfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesCfbDecrypt)
- [DesOfbEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesOfbEncrypt)
- [DesOfbDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#DesOfbDecrypt)
- [HmacMd5](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacMd5)
- [HmacSha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacSha1)
- [HmacSha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacSha256)
- [HmacSha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#HmacSha512)
- [Md5String](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Md5String)
- [Md5File](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Md5File)
- [Sha1](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Sha1)
- [Sha256](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Sha256)
- [Sha512](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#Sha512)
- [GenerateRsaKey](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#GenerateRsaKey)
- [RsaEncrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#RsaEncrypt)
- [RsaDecrypt](https://github.com/duke-git/lancet/blob/main/docs/cryptor_zh-CN.md#RsaDecrypt)

-### datetime日期时间处理包，格式化日期，比较日期。
+-   [ColorHexToRGB](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ColorHexToRGB)
+-   [ColorRGBToHex](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ColorRGBToHex)
+-   [ToBool](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToBool)
+-   [ToBytes](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToBytes)
+-   [ToChar](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToChar)
+-   [ToChannel](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToChannel)
+-   [ToInt](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToInt)
+-   [ToJson](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToJson)
+-   [ToString](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToString)
+-   [StructToMap](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#StructToMap)
+-   [MapToStruct](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#MapToStruct)
+-   [EncodeByte](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#EncodeByte)
+-   [DecodeByte](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#DecodeByte)
+-   [DeepClone](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#DeepClone)
+-   [CopyProperties](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#CopyProperties)
+-   [ToInterface](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToInterface)
+-   [Utf8ToGbk](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#Utf8ToGbk)
+-   [GbkToUtf8](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#GbkToUtf8)
+-   [ToStdBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToStdBase64)
+-   [ToUrlBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToUrlBase64)
+-   [ToRawStdBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToRawStdBase64)
+-   [ToRawUrlBase64](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToRawUrlBase64)
+-   [ToBigInt](https://github.com/duke-git/lancet/blob/v1/docs/convertor_zh-CN.md#ToBigInt)


+### 3. cryptor 加密包支持数据加密和解密，获取 md5，hash 值。支持 base64, md5, hmac, aes, des, rsa。
+
 ```go
-import "github.com/duke-git/lancet/v2/datetime"
+import "github.com/duke-git/lancet/cryptor"
 ```
-#### 函数列表:
- [AddDay](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#AddDay)
- [AddHour](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#AddHour)
- [AddMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#AddMinute)
- [BeginOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMinute)
- [BeginOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfHour)
- [BeginOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfDay)
- [BeginOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfWeek)
- [BeginOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfMonth)
- [BeginOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#BeginOfYear)
- [EndOfMinute](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMinute)
- [EndOfHour](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfHour)
- [EndOfDay](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfDay)
- [EndOfWeek](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfWeek)
- [EndOfMonth](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfMonth)
- [EndOfYear](https://github.com/duke-git/lancet/blob/main/docs/datetime.md#EndOfYear)
- [GetNowDate](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNowDate)
- [GetNowTime](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNowTime)
- [GetNowDateTime](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNowDateTime)
- [GetZeroHourTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetZeroHourTimestamp)
- [GetNightTimestamp](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#GetNightTimestamp)
- [FormatTimeToStr](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#FormatTimeToStr)
- [FormatStrToTime](https://github.com/duke-git/lancet/blob/main/docs/datetime_zh-CN.md#FormatStrToTime)

-### fileutil包支持文件基本操作。
+#### 函数列表:
+
+-   [AesEcbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesEcbEncrypt)
+-   [AesEcbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesEcbDecrypt)
+-   [AesCbcEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesCbcEncrypt)
+-   [AesCbcDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesCbcDecrypt)
+-   [AesCtrCrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesCtrCrypt)
+-   [AesCfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesCfbEncrypt)
+-   [AesCfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesCfbDecrypt)
+-   [AesOfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesOfbEncrypt)
+-   [AesOfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#AesOfbDecrypt)
+-   [Base64StdEncode](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Base64StdEncode)
+-   [Base64StdDecode](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Base64StdDecode)
+-   [DesEcbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesEcbEncrypt)
+-   [DesEcbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesEcbDecrypt)
+-   [DesCbcEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesCbcEncrypt)
+-   [DesCbcDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesCbcDecrypt)
+-   [DesCtrCrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesCtrCrypt)
+-   [DesCfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesCfbEncrypt)
+-   [DesCfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesCfbDecrypt)
+-   [DesOfbEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesOfbEncrypt)
+-   [DesOfbDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#DesOfbDecrypt)
+-   [HmacMd5](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#HmacMd5)
+-   [HmacMd5WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#HmacMd5WithBase64)
+md#HmacSha256WithBase64)
+-   [HmacSha1](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#HmacSha1)
+-   [HmacSha1WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#HmacSha1WithBase64)
+-   [HmacSha256](https://github.com/duke-git/lancet/blob/v1/docs/cryptor.md#HmacSha256)
+-   [HmacSha256WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#HmacSha256WithBase64)
+-   [HmacSha512](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#HmacSha512)
+-   [HmacSha512WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#HmacSha512WithBase64)
+-   [Md5String](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Md5String)
+-   [Md5StringWithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Md5StringWithBase64)
+-   [Md5Byte](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Md5Byte)
+-   [Md5ByteWithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Md5ByteWithBase64)
+-   [Md5File](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Md5File)
+-   [Sha1](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Sha1)
+-   [Sha1WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Sha1WithBase64)
+-   [Sha256](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Sha256)
+-   [Sha256WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Sha256WithBase64)
+-   [Sha512](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Sha512)
+-   [Sha512WithBase64](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#Sha512WithBase64)
+-   [GenerateRsaKey](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#GenerateRsaKey)
+-   [RsaEncrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#RsaEncrypt)
+-   [RsaDecrypt](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#RsaDecrypt)
+-   [GenerateRsaKeyPair](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#GenerateRsaKeyPair)
+-   [RsaEncryptOAEP](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#RsaEncryptOAEP)
+-   [RsaDecryptOAEP](https://github.com/duke-git/lancet/blob/v1/docs/cryptor_zh-CN.md#RsaDecryptOAEP)
+
+
+### 4. datetime 日期时间处理包，格式化日期，比较日期。

 ```go
-import "github.com/duke-git/lancet/v2/fileutil"
+import "github.com/duke-git/lancet/datetime"
+```
+
+#### 函数列表:
+
+-   [AddDay](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#AddDay)
+-   [AddHour](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#AddHour)
+-   [AddMinute](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#AddMinute)
+-   [AddYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#AddYear)
+-   [BeginOfMinute](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfMinute)
+-   [BeginOfHour](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfHour)
+-   [BeginOfDay](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfDay)
+-   [BeginOfWeek](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfWeek)
+-   [BeginOfMonth](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfMonth)
+-   [BeginOfYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#BeginOfYear)
+-   [EndOfMinute](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfMinute)
+-   [EndOfHour](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfHour)
+-   [EndOfDay](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfDay)
+-   [EndOfWeek](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfWeek)
+-   [EndOfMonth](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfMonth)
+-   [EndOfYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime.md#EndOfYear)
+-   [GetNowDate](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#GetNowDate)
+-   [GetNowTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#GetNowTime)
+-   [GetNowDateTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#GetNowDateTime)
+-   [GetZeroHourTimestamp](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#GetZeroHourTimestamp)
+-   [GetNightTimestamp](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#GetNightTimestamp)
+-   [FormatTimeToStr](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#FormatTimeToStr)
+-   [FormatStrToTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#FormatStrToTime)
+-   [NewUnix](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#NewUnix)
+-   [NewUnixNow](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#NewUnixNow)
+-   [NewFormat](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#NewFormat)
+-   [NewISO8601](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#NewISO8601)
+-   [ToUnix](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#ToUnix)
+-   [ToFormat](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#ToFormat)
+-   [ToFormatForTpl](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#ToFormatForTpl)
+-   [ToIso8601](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#ToIso8601)
+-   [IsLeapYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#IsLeapYear)
+-   [BetweenSeconds](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#BetweenSeconds)
+-   [DayOfYear](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#DayOfYear)
+-   [IsWeekend](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#IsWeekend)
+-   [NowDateOrTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#NowDateOrTime)
+-   [Timestamp](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#Timestamp)
+-   [TimestampMilli](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#TimestampMilli)
+-   [TimestampMicro](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#TimestampMicro)
+-   [TimestampNano](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#TimestampNano)
+-   [TrackFuncTime](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#TrackFuncTime)
+-   [DaysBetween](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#DaysBetween)
+-   [GenerateDatetimesBetween](https://github.com/duke-git/lancet/blob/v1/docs/datetime_zh-CN.md#GenerateDatetimesBetween)
+
+### 5. fileutil 包支持文件基本操作。
+
+```go
+import "github.com/duke-git/lancet/fileutil"
 ```

 #### 函数列表：

- [ClearFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#ClearFile)
- [CreateFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#CreateFile)
- [CopyFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#CopyFile)
- [FileMode](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#FileMode)
- [MiMeType](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#MiMeType)
- [IsExist](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#IsExist)
- [IsLink](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#IsLink)
- [IsDir](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#IsDir)
- [ListFileNames](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#ListFileNames)
- [RemoveFile](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#RemoveFile)
- [ReadFileToString](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#ReadFileToString)
- [ReadFileByLine](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#ReadFileByLine)
- [Zip](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#Zip)
- [UnZip](https://github.com/duke-git/lancet/blob/main/docs/fileutil_zh-CN.md#UnZip)
+-   [ClearFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#ClearFile)
+-   [CreateFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#CreateFile)
+-   [CreateDir](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#CreateDir)
+-   [CopyFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#CopyFile)
+-   [FileMode](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#FileMode)
+-   [MiMeType](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#MiMeType)
+-   [IsExist](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#IsExist)
+-   [IsLink](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#IsLink)
+-   [IsDir](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#IsDir)
+-   [ListFileNames](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#ListFileNames)
+-   [RemoveFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#RemoveFile)
+-   [ReadFileToString](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#ReadFileToString)
+-   [ReadFileByLine](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#ReadFileByLine)
+-   [Zip](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#Zip)
+-   [ZipAppendEntry](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#ZipAppendEntry)
+-   [UnZip](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#UnZip)
+-   [CurrentPath](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#CurrentPath)
+-   [IsZipFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#IsZipFile)
+-   [FileSize](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#FileSize)
+-   [MTime](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#MTime)
+-   [Sha](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#Sha)
+-   [ReadCsvFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#ReadCsvFile)
+-   [WriteCsvFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#WriteCsvFile)
+-   [WriteMapsToCsv](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#WriteMapsToCsv)
+-   [WriteStringToFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#WriteStringToFile)
+-   [WriteBytesToFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#WriteBytesToFile)
+-   [ReadFile](https://github.com/duke-git/lancet/blob/v1/docs/fileutil_zh-CN.md#ReadFile)

-### formatter格式化器包含一些数据格式化处理方法。
+### 6. formatter 格式化器包含一些数据格式化处理方法。

 ```go
-import "github.com/duke-git/lancet/v2/formatter"
-```
-#### 函数列表:
- [Comma](https://github.com/duke-git/lancet/blob/main/docs/formatter_zh-CN.md#Comma)
-
-
-### function函数包控制函数执行流程，包含部分函数式编程。
-
-```go
-import "github.com/duke-git/lancet/v2/function"
+import "github.com/duke-git/lancet/formatter"
 ```

 #### 函数列表:
- [After](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#After)
- [Before](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Before)
- [Curry](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Curry)
- [Compose](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Compose)
- [Debounced](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Debounced)
- [Delay](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Delay)
- [Watcher](https://github.com/duke-git/lancet/blob/main/docs/function_zh-CN.md#Watcher)

-### mathutil包实现了一些数学计算的函数。
+-   [Comma](https://github.com/duke-git/lancet/blob/v1/docs/formatter_zh-CN.md#Comma)
+-   [Pretty](https://github.com/duke-git/lancet/blob/v1/docs/formatter_zh-CN.md#Pretty)
+-   [PrettyToWriter](https://github.com/duke-git/lancet/blob/v1/docs/formatter_zh-CN.md#PrettyToWriter)
+-   [DecimalBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter_zh-CN.md#DecimalBytes)
+-   [BinaryBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter_zh-CN.md#BinaryBytes)
+-   [ParseDecimalBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter_zh-CN.md#ParseDecimalBytes)
+-   [ParseBinaryBytes](https://github.com/duke-git/lancet/blob/v1/docs/formatter_zh-CN.md#ParseBinaryBytes)
+
+### 7. function 函数包控制函数执行流程，包含部分函数式编程。

 ```go
-import "github.com/duke-git/lancet/v2/mathutil"
+import "github.com/duke-git/lancet/function"
+```
+
+#### 函数列表:
+
+-   [After](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#After)
+-   [Before](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Before)
+-   [Curry](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Curry)
+-   [Compose](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Compose)
+-   [Debounced](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Debounced)
+-   [Debounce](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Debounce)
+-   [Throttle](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Throttle)
+-   [Delay](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Delay)
+-   [Pipeline](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Pipeline)
+-   [Schedule](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Schedule)
+-   [Watcher](https://github.com/duke-git/lancet/blob/v1/docs/function_zh-CN.md#Watcher)
+
+### 8. mathutil 包实现了一些数学计算的函数。
+
+```go
+import "github.com/duke-git/lancet/mathutil"
 ```

 #### Function list:
- [Exponent](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Exponent)
- [Fibonacci](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Fibonacci)
- [Factorial](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Factorial)
- [Percent](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#Percent)
- [RoundToFloat](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#RoundToFloat)
- [RoundToString](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#RoundToString)
- [TruncRound](https://github.com/duke-git/lancet/blob/main/docs/mathutil_zh-CN.md#TruncRound)

-### netutil网络包支持获取ip地址，发送http请求。
+-   [Exponent](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#Exponent)
+-   [Fibonacci](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#Fibonacci)
+-   [Factorial](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#Factorial)
+-   [Percent](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#Percent)
+-   [RoundToFloat](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#RoundToFloat)
+-   [RoundToString](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#RoundToString)
+-   [TruncRound](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#TruncRound)
+-   [CeilToFloat](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#CeilToFloat)
+-   [CeilToString](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#CeilToString)
+-   [FloorToFloat](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#FloorToFloat)
+-   [FloorToString](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#FloorToString)
+-   [AngleToRadian](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#AngleToRadian)
+-   [RadianToAngle](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#RadianToAngle)
+-   [PointDistance](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#PointDistance)
+-   [IsPrime](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#IsPrime)
+-   [GCD](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#GCD)
+-   [LCM](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#LCM)
+-   [Cos](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#Cos)
+-   [Sin](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#Sin)
+-   [Log](https://github.com/duke-git/lancet/blob/v1/docs/mathutil_zh-CN.md#Log)
+### 9. netutil 网络包支持获取 ip 地址，发送 http 请求。

 ```go
-import "github.com/duke-git/lancet/v2/netutil"
-```
-
-#### 函数列表:
- [ConvertMapToQueryString](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#ConvertMapToQueryString)
- [GetInternalIp](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#GetInternalIp)
- [GetIps](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetIps)
- [GetMacAddrs](https://github.com/duke-git/lancet/blob/main/docs/netutil.md#GetMacAddrs)
- [GetPublicIpInfo](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#GetPublicIpInfo)
- [IsPublicIP](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#IsPublicIP)
- [HttpGet](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpGet)
- [HttpDelete](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpDelete)
- [HttpPost](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpPost)
- [HttpPut](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpPut)
- [HttpPatch](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#HttpPatch)
- [ParseHttpResponse](https://github.com/duke-git/lancet/blob/main/docs/netutil_zh-CN.md#ParseHttpResponse)
-
-### random随机数生成器包，可以生成随机[]bytes, int, string。
-
-```go
-import "github.com/duke-git/lancet/v2/random"
-```
-
-#### 函数列表:
- [RandBytes](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandBytes)
- [RandInt](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandInt)
- [RandString](https://github.com/duke-git/lancet/blob/main/docs/random_zh-CN.md#RandString)
- [UUIdV4](https://github.com/duke-git/lancet/blob/main/docs/random.md#UUIdV4)
-### retry重试执行函数直到函数运行成功或被context cancel。
-
-```go
-import "github.com/duke-git/lancet/v2/retry"
-```
-
-#### 函数列表:
- [Context](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#Context)
- [Retry](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#Retry)
- [RetryFunc](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#RetryFunc)
- [RetryDuration](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#RetryDuration)
- [RetryTimes](https://github.com/duke-git/lancet/blob/main/docs/retry_zh-CN.md#RetryTimes)
-
-
-### slice包包含操作切片的方法集合。
-
-```go
-import "github.com/duke-git/lancet/v2/slice"
-```
-
-#### 函数列表:
- [Contain](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Contain)
- [ContainSubSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ContainSubSlice)
- [Chunk](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Chunk)
- [Compact](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Compact)
- [Concat](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Concat)
- [Count](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Count)
- [Difference](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Difference)
- [DifferenceBy](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#DifferenceBy)
- [DifferenceWith](https://github.com/duke-git/lancet/blob/main/docs/slice.md#DifferenceWith)
- [DeleteAt](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#DeleteAt)
- [Drop](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Drop)
- [Every](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Every)
- [Filter](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Filter)
- [Find](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Find)
- [FindLast](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#FindLast)
- [FlattenDeep](#FlattenDeep)
- [ForEach](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#ForEach)
- [GroupBy](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#GroupBy)
- [IntSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#IntSlice)
- [InterfaceSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#InterfaceSlice)
- [Intersection](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Intersection)
- [InsertAt](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#InsertAt)
- [Map](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Map)
- [Reverse](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Reverse)
- [Reduce](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Reduce)
- [Shuffle](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Shuffle)
- [SortByField](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#SortByField)
- [Some](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Some)
- [StringSlice](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#StringSlice)
- [Unique](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Unique)
- [Union](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Union)
- [UpdateAt](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#UpdateAt)
- [Without](https://github.com/duke-git/lancet/blob/main/docs/slice_zh-CN.md#Without)
-
-
-### strutil包含处理字符串的相关函数。
-
-```go
-import "github.com/duke-git/lancet/v2/strutil"
+import "github.com/duke-git/lancet/netutil"
 ```

 #### 函数列表:

- [After](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#After)
- [AfterLast](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#AfterLast)
- [Before](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Before)
- [BeforeLast](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#BeforeLast)
- [CamelCase](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#CamelCase)
- [Capitalize](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Capitalize)
- [IsString](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#IsString)
- [KebabCase](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#KebabCase)
- [LowerFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#LowerFirst)
- [UpperFirst](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#UpperFirst)
- [PadEnd](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#PadEnd)
- [PadStart](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#PadStart)
- [ReverseStr](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#ReverseStr)
- [SnakeCase](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#SnakeCase)
- [Wrap](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Wrap)
- [Unwrap](https://github.com/duke-git/lancet/blob/main/docs/strutil_zh-CN.md#Unwrap)
-  
+-   [ConvertMapToQueryString](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#ConvertMapToQueryString)
+-   [EncodeUrl](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#EncodeUrl)
+-   [GetInternalIp](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#GetInternalIp)
+-   [GetIps](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#GetIps)
+-   [GetMacAddrs](https://github.com/duke-git/lancet/blob/v1/docs/netutil.md#GetMacAddrs)
+-   [GetPublicIpInfo](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#GetPublicIpInfo)
+-   [GetRequestPublicIp](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#GetRequestPublicIp)
+-   [IsPublicIP](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#IsPublicIP)
+-   [IsInternalIP](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#IsInternalIP)
+-   [HttpGet](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#HttpGet)
+-   [HttpDelete](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#HttpDelete)
+-   [HttpPost](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#HttpPost)
+-   [HttpPut](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#HttpPut)
+-   [HttpPatch](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#HttpPatch)
+-   [ParseHttpResponse](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#ParseHttpResponse)
+-   [UploadFile](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#UploadFile)
+-   [DownloadFile](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#DownloadFile)
+-   [IsPingConnected](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#IsPingConnected)
+-   [IsTelnetConnected](https://github.com/duke-git/lancet/blob/v1/docs/netutil_zh-CN.md#IsTelnetConnected)

-### system包含os, runtime, shell command相关函数。
+### 10. random 随机数生成器包，可以生成随机[]bytes, int, string。

 ```go
-import "github.com/duke-git/lancet/v2/system"
+import "github.com/duke-git/lancet/random"
 ```

 #### 函数列表:
- [IsWindows](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#IsWindows)
- [IsLinux](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#IsLinux)
- [IsMac](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#IsMac)
- [GetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#GetOsEnv)
- [SetOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#SetOsEnv)
- [RemoveOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#RemoveOsEnv)
- [CompareOsEnv](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#CompareOsEnv)
- [ExecCommand](https://github.com/duke-git/lancet/blob/main/docs/system_zh-CN.md#ExecCommand)

-### validator验证器包，包含常用字符串格式验证函数。
+-   [RandBool](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandBool)
+-   [RandBoolSlice](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandBoolSlice)
+-   [RandBytes](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandBytes)
+-   [RandInt](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandInt)
+-   [RandIntSlice](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandIntSlice)
+-   [RandString](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandString)
+-   [RandStringSlice](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandStringSlice)
+-   [RandFloat](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandFloat)
+-   [RandFloats](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandFloats)
+-   [RandUpper](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandUpper)
+-   [RandLower](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandLower)
+-   [RandNumeral](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandNumeral)
+-   [RandNumeralOrLetter](https://github.com/duke-git/lancet/blob/v1/docs/random_zh-CN.md#RandNumeralOrLetter)
+-   [UUIdV4](https://github.com/duke-git/lancet/blob/v1/docs/random.md#UUIdV4)
+-   [RandUniqueIntSlice](https://github.com/duke-git/lancet/blob/v1/docs/random.md#RandUniqueIntSlice)
+
+### 11. retry 重试执行函数直到函数运行成功或被 context cancel。

 ```go
-import "github.com/duke-git/lancet/v2/validator"
+import "github.com/duke-git/lancet/retry"
 ```
+
 #### 函数列表:

- [ContainChinese](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainChinese)
- [ContainLetter](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainLetter)
- [ContainLower](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainLower)
- [ContainUpper](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#ContainUpper)
- [IsAlpha](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsAlpha)
- [IsAllUpper](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsAllUpper)
- [IsAllLower](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsAllLower)
- [IsBase64](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsBase64)
- [IsChineseMobile](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsChineseMobile)
- [IsChineseIdNum](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsChineseIdNum)
- [IsChinesePhone](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsChinesePhone)
- [IsCreditCard](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsCreditCard)
- [IsDns](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsDns)
- [IsEmail](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsEmail)
- [IsEmptyString](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsEmptyString)
- [IsFloatStr](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsFloatStr)
- [IsNumberStr](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsNumberStr)
- [IsJSON](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsJSON)
- [IsRegexMatch](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsRegexMatch)
- [IsIntStr](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIntStr)
- [IsIp](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIp)
- [IsIpV4](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIpV4)
- [IsIpV6](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsIpV6)
- [IsStrongPassword](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsStrongPassword)
- [IsUrl](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsUrl)
- [IsWeakPassword](https://github.com/duke-git/lancet/blob/main/docs/validator_zh-CN.md#IsWeakPassword)
+-   [Context](https://github.com/duke-git/lancet/blob/v1/docs/retry_zh-CN.md#Context)
+-   [Retry](https://github.com/duke-git/lancet/blob/v1/docs/retry_zh-CN.md#Retry)
+-   [RetryFunc](https://github.com/duke-git/lancet/blob/v1/docs/retry_zh-CN.md#RetryFunc)
+-   [RetryDuration](https://github.com/duke-git/lancet/blob/v1/docs/retry_zh-CN.md#RetryDuration)
+-   [RetryTimes](https://github.com/duke-git/lancet/blob/v1/docs/retry_zh-CN.md#RetryTimes)

-validator.md#IsWeakPassword)
-### xerror包实现一些错误处理函数
+### 12. slice 包包含操作切片的方法集合。

 ```go
-import "github.com/duke-git/lancet/v2/xerror"
+import "github.com/duke-git/lancet/slice"
 ```
+
 #### 函数列表:
- [Unwrap](https://github.com/duke-git/lancet/blob/main/docs/xerror_zh-CN.md#Unwrap)
+
+-   [AppendIfAbsent](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#AppendIfAbsent)
+-   [Contain](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Contain)
+-   [ContainSubSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#ContainSubSlice)
+-   [Chunk](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Chunk)
+-   [Compact](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Compact)
+-   [Concat](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Concat)
+-   [Count](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Count)
+-   [Difference](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Difference)
+-   [DifferenceBy](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#DifferenceBy)
+-   [DeleteByIndex](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#DeleteByIndex)
+-   [Drop](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Drop)
+-   [Every](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Every)
+-   [Equal](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Equal)
+-   [EqualWith](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#EqualWith)
+-   [Filter](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Filter)
+-   [Find](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Find)
+-   [FindLast](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#FindLast)
+-   [FlattenDeep](https://github.com/duke-git/lancet/blob/v1/docs/slice.md#FlattenDeep)
+-   [ForEach](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#ForEach)
+-   [GroupBy](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#GroupBy)
+-   [IntSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#IntSlice)
+-   [IndexOf](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#IndexOf)
+-   [LastIndexOf](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#LastIndexOf)
+-   [InterfaceSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#InterfaceSlice)
+-   [Intersection](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Intersection)
+-   [InsertByIndex](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#InsertByIndex)
+-   [Map](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Map)
+-   [ReverseSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#ReverseSlice)
+-   [Reduce](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Reduce)
+-   [Shuffle](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Shuffle)
+-   [SortByField](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#SortByField)
+-   [Some](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Some)
+-   [StringSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#StringSlice)
+-   [ToSlice](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#ToSlice)
+-   [ToSlicePointer](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#ToSlice)
+-   [Unique](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Unique)
+-   [UniqueBy](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#UniqueBy)
+-   [Union](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Union)
+-   [UpdateByIndex](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#UpdateByIndex)
+-   [Without](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Without)
+-   [Join](https://github.com/duke-git/lancet/blob/v1/docs/slice_zh-CN.md#Join)
+
+### 13. strutil 包含处理字符串的相关函数。
+
+```go
+import "github.com/duke-git/lancet/strutil"
+```
+
+#### 函数列表:
+
+-   [After](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#After)
+-   [AfterLast](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#AfterLast)
+-   [Before](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Before)
+-   [BeforeLast](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#BeforeLast)
+-   [CamelCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#CamelCase)
+-   [Capitalize](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Capitalize)
+-   [ContainsAll](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#ContainsAll)
+-   [ContainsAny](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#ContainsAny)
+-   [IsString](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#IsString)
+-   [KebabCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#KebabCase)
+-   [UpperKebabCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#UpperKebabCase)
+-   [LowerFirst](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#LowerFirst)
+-   [UpperFirst](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#UpperFirst)
+-   [Pad](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Pad)
+-   [PadEnd](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#PadEnd)
+-   [PadStart](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#PadStart)
+-   [Reverse](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Reverse)
+-   [SnakeCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#SnakeCase)
+-   [UpperSnakeCase](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#UpperSnakeCase)
+-   [SplitEx](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#SplitEx)
+-   [Wrap](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Wrap)
+-   [Unwrap](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Unwrap)
+-   [SplitWords](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#SplitWords)
+-   [WordCount](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#WordCount)
+-   [RemoveNonPrintable](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#RemoveNonPrintable)
+-   [StringToBytes](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#StringToBytes)
+-   [BytesToString](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#BytesToString)
+-   [IsBlank](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#IsBlank)
+-   [HasPrefixAny](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#HasPrefixAny)
+-   [HasSuffixAny](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#HasSuffixAny)
+-   [IndexOffset](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#IndexOffset)
+-   [ReplaceWithMap](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#ReplaceWithMap)
+-   [Trim](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Trim)
+-   [SplitAndTrim](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#SplitAndTrim)
+-   [HideString](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#HideString)
+-   [RemoveWhiteSpace](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#RemoveWhiteSpace)
+-   [SubInBetween](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#SubInBetween)
+-   [HammingDistance](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#HammingDistance)
+-   [Concat](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Concat)
+-   [Ellipsis](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Ellipsis)
+-   [Shuffle](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Shuffle)
+-   [Rotate](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Rotate)
+-   [TemplateReplace](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#TemplateReplace)
+-   [RegexMatchAllGroups](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#RegexMatchAllGroups)
+-   [Cut](https://github.com/duke-git/lancet/blob/v1/docs/strutil_zh-CN.md#Cut)
+
+### 14. system 包含 os, runtime, shell command 相关函数。
+
+```go
+import "github.com/duke-git/lancet/system"
+```
+
+#### 函数列表:
+
+-   [IsWindows](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#IsWindows)
+-   [IsLinux](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#IsLinux)
+-   [IsMac](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#IsMac)
+-   [GetOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#GetOsEnv)
+-   [SetOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#SetOsEnv)
+-   [RemoveOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#RemoveOsEnv)
+-   [CompareOsEnv](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#CompareOsEnv)
+-   [ExecCommand](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#ExecCommand)
+-   [GetOsBits](https://github.com/duke-git/lancet/blob/v1/docs/system_zh-CN.md#GetOsBits)
+
+### 15. validator 验证器包，包含常用字符串格式验证函数。
+
+```go
+import "github.com/duke-git/lancet/validator"
+```
+
+#### 函数列表:
+
+-   [ContainChinese](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#ContainChinese)
+-   [ContainLetter](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#ContainLetter)
+-   [ContainLower](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#ContainLower)
+-   [ContainUpper](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#ContainUpper)
+-   [IsAlpha](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsAlpha)
+-   [IsAllUpper](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsAllUpper)
+-   [IsAllLower](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsAllLower)
+-   [IsBase64](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsBase64)
+-   [IsChineseMobile](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsChineseMobile)
+-   [IsChineseIdNum](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsChineseIdNum)
+-   [IsChinesePhone](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsChinesePhone)
+-   [IsCreditCard](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsCreditCard)
+-   [IsDns](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsDns)
+-   [IsEmail](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsEmail)
+-   [IsEmptyString](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsEmptyString)
+-   [IsInt](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsInt)
+-   [IsFloat](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsFloat)
+-   [IsNumber](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsNumber)
+-   [IsIntStr](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsIntStr)
+-   [IsFloatStr](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsFloatStr)
+-   [IsNumberStr](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsNumberStr)
+-   [IsJSON](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsJSON)
+-   [IsRegexMatch](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsRegexMatch)
+-   [IsIp](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsIp)
+-   [IsIpV4](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsIpV4)
+-   [IsIpV6](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsIpV6)
+-   [IsStrongPassword](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsStrongPassword)
+-   [IsUrl](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsUrl)
+-   [IsWeakPassword](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsWeakPassword)
+-   [IsZeroValue](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsZeroValue)
+-   [IsGBK](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsGBK)
+-   [IsASCII](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsASCII)
+-   [IsPrintable](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsPrintable)
+-   [IsBin](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsBin)
+-   [IsHex](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsHex)
+-   [IsBase64URL](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsBase64URL)
+-   [IsJWT](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsJWT)
+-   [IsVisa](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsVisa)
+-   [IsMasterCard](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsMasterCard)
+-   [IsAmericanExpress](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsAmericanExpress)
+-   [IsUnionPay](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsUnionPay)
+-   [IsChinaUnionPay](https://github.com/duke-git/lancet/blob/v1/docs/validator_zh-CN.md#IsChinaUnionPay)

 ## 如何贡献代码

-非常感激任何的代码提交以使lancet的功能越来越强大。创建pull request时请遵守以下规则。
+非常感激任何的代码提交以使 lancet 的功能越来越强大。创建 pull request 时请遵守以下规则。

-1. Fork lancet仓库。
+1. Fork lancet 仓库。
 2. 创建自己的特性分支。
 3. 提交变更。
-4. Push分支。
-5. 创建新的pull request。
+4. Push 分支。
+5. 创建新的 pull request。
--- a/algorithm/lru_cache.go
+++ b/algorithm/lru_cache.go
@@ -1,102 +0,0 @@
-package algorithm
-
-type lruNode[K comparable, V any] struct {
-	key   K
-	value V
-	pre   *lruNode[K, V]
-	next  *lruNode[K, V]
-}
-
-// newLruNode return a lruNode pointer
-func newLruNode[K comparable, V any](key K, value V) *lruNode[K, V] {
-	return &lruNode[K, V]{
-		key:   key,
-		value: value,
-		pre:   nil,
-		next:  nil,
-	}
-}
-
-// LRUCache lru cache (thread unsafe)
-type LRUCache[K comparable, V any] struct {
-	cache    map[K]*lruNode[K, V]
-	head     *lruNode[K, V]
-	tail     *lruNode[K, V]
-	capacity int
-	length   int
-}
-
-// NewLRUCache return a LRUCache pointer
-func NewLRUCache[K comparable, V any](capacity int) *LRUCache[K, V] {
-	return &LRUCache[K, V]{
-		cache:    make(map[K]*lruNode[K, V], capacity),
-		head:     nil,
-		tail:     nil,
-		capacity: capacity,
-		length:   0,
-	}
-}
-
-// Get value of key from lru cache
-func (l *LRUCache[K, V]) Get(key K) (V, bool) {
-	var value V
-
-	node, ok := l.cache[key]
-	if ok {
-		l.moveToHead(node)
-		return node.value, true
-	}
-
-	return value, false
-}
-
-// Put value of key into lru cache
-func (l *LRUCache[K, V]) Put(key K, value V) {
-	node, ok := l.cache[key]
-	if !ok {
-		newNode := newLruNode(key, value)
-		l.cache[key] = newNode
-		l.addNode(newNode)
-
-		if len(l.cache) > l.capacity {
-			oldKey := l.deleteNode(l.head)
-			delete(l.cache, oldKey)
-		}
-	} else {
-		node.value = value
-		l.moveToHead(node)
-	}
-	l.length = len(l.cache)
-}
-
-func (l *LRUCache[K, V]) addNode(node *lruNode[K, V]) {
-	if l.tail != nil {
-		l.tail.next = node
-		node.pre = l.tail
-		node.next = nil
-	}
-	l.tail = node
-	if l.head == nil {
-		l.head = node
-	}
-}
-
-func (l *LRUCache[K, V]) deleteNode(node *lruNode[K, V]) K {
-	if node == l.tail {
-		l.tail = l.tail.pre
-	} else if node == l.head {
-		l.head = l.head.next
-	} else {
-		node.pre.next = node.next
-		node.next.pre = node.pre
-	}
-	return node.key
-}
-
-func (l *LRUCache[K, V]) moveToHead(node *lruNode[K, V]) {
-	if l.tail == node {
-		return
-	}
-	l.deleteNode(node)
-	l.addNode(node)
-}
--- a/algorithm/lru_cache_test.go
+++ b/algorithm/lru_cache_test.go
@@ -1,36 +0,0 @@
-package algorithm
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-func TestLRUCache(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestLRUCache")
-
-	cache := NewLRUCache[int, int](2)
-
-	cache.Put(1, 1)
-	cache.Put(2, 2)
-
-	_, ok := cache.Get(0)
-	asssert.Equal(false, ok)
-
-	v, ok := cache.Get(1)
-	asssert.Equal(true, ok)
-	asssert.Equal(1, v)
-
-	v, ok = cache.Get(2)
-	asssert.Equal(true, ok)
-	asssert.Equal(2, v)
-
-	cache.Put(3, 3)
-	v, ok = cache.Get(1)
-	asssert.Equal(false, ok)
-	asssert.NotEqual(1, v)
-
-	v, ok = cache.Get(3)
-	asssert.Equal(true, ok)
-	asssert.Equal(3, v)
-}
--- a/algorithm/search.go
+++ b/algorithm/search.go
@@ -1,63 +0,0 @@
-// Copyright 2021 dudaodong@gmail.com. All rights reserved.
-// Use of this source code is governed by MIT license
-
-// Package algorithm contain some basic algorithm functions. eg. sort, search, list, linklist, stack, queue, tree, graph. TODO
-package algorithm
-
-import "github.com/duke-git/lancet/v2/lancetconstraints"
-
-// Search algorithms see https://github.com/TheAlgorithms/Go/tree/master/search
-
-// LinearSearch Simple linear search algorithm that iterates over all elements of an slice
-// If a target is found, the index of the target is returned. Else the function return -1
-func LinearSearch[T any](slice []T, target T, comparator lancetconstraints.Comparator) int {
-	for i, v := range slice {
-		if comparator.Compare(v, target) == 0 {
-			return i
-		}
-	}
-	return -1
-}
-
-// BinarySearch search for target within a sorted slice, recursive call itself.
-// If a target is found, the index of the target is returned. Else the function return -1
-func BinarySearch[T any](sortedSlice []T, target T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) int {
-	if highIndex < lowIndex || len(sortedSlice) == 0 {
-		return -1
-	}
-
-	midIndex := int(lowIndex + (highIndex-lowIndex)/2)
-	isMidValGreatTarget := comparator.Compare(sortedSlice[midIndex], target) == 1
-	isMidValLessTarget := comparator.Compare(sortedSlice[midIndex], target) == -1
-
-	if isMidValGreatTarget {
-		return BinarySearch(sortedSlice, target, lowIndex, midIndex-1, comparator)
-	} else if isMidValLessTarget {
-		return BinarySearch(sortedSlice, target, midIndex+1, highIndex, comparator)
-	}
-
-	return midIndex
-}
-
-// BinaryIterativeSearch search for target within a sorted slice.
-// If a target is found, the index of the target is returned. Else the function return -1
-func BinaryIterativeSearch[T any](sortedSlice []T, target T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) int {
-	startIndex := lowIndex
-	endIndex := highIndex
-
-	var midIndex int
-	for startIndex <= endIndex {
-		midIndex = int(startIndex + (endIndex-startIndex)/2)
-		isMidValGreatTarget := comparator.Compare(sortedSlice[midIndex], target) == 1
-		isMidValLessTarget := comparator.Compare(sortedSlice[midIndex], target) == -1
-
-		if isMidValGreatTarget {
-			endIndex = midIndex - 1
-		} else if isMidValLessTarget {
-			startIndex = midIndex + 1
-		} else {
-			return midIndex
-		}
-	}
-	return -1
-}
--- a/algorithm/search_test.go
+++ b/algorithm/search_test.go
@@ -1,33 +0,0 @@
-package algorithm
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-var sortedNumbers = []int{1, 2, 3, 4, 5, 6, 7, 8}
-
-func TestLinearSearch(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestLinearSearch")
-
-	comparator := &intComparator{}
-	asssert.Equal(4, LinearSearch(sortedNumbers, 5, comparator))
-	asssert.Equal(-1, LinearSearch(sortedNumbers, 9, comparator))
-}
-
-func TestBinarySearch(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestBinarySearch")
-
-	comparator := &intComparator{}
-	asssert.Equal(4, BinarySearch(sortedNumbers, 5, 0, len(sortedNumbers)-1, comparator))
-	asssert.Equal(-1, BinarySearch(sortedNumbers, 9, 0, len(sortedNumbers)-1, comparator))
-}
-
-func TestBinaryIterativeSearch(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestBinaryIterativeSearch")
-
-	comparator := &intComparator{}
-	asssert.Equal(4, BinaryIterativeSearch(sortedNumbers, 5, 0, len(sortedNumbers)-1, comparator))
-	asssert.Equal(-1, BinaryIterativeSearch(sortedNumbers, 9, 0, len(sortedNumbers)-1, comparator))
-}
--- a/algorithm/sorter.go
+++ b/algorithm/sorter.go
@@ -1,208 +0,0 @@
-// Copyright 2021 dudaodong@gmail.com. All rights reserved.
-// Use of this source code is governed by MIT license
-
-// Package algorithm contain some basic algorithm functions. eg. sort, search
-package algorithm
-
-import "github.com/duke-git/lancet/v2/lancetconstraints"
-
-// BubbleSort use bubble to sort slice.
-func BubbleSort[T any](slice []T, comparator lancetconstraints.Comparator) []T {
-	for i := 0; i < len(slice); i++ {
-		for j := 0; j < len(slice)-1-i; j++ {
-			isCurrGreatThanNext := comparator.Compare(slice[j], slice[j+1]) == 1
-			if isCurrGreatThanNext {
-				swap(slice, j, j+1)
-			}
-		}
-	}
-	return slice
-}
-
-// InsertionSort use insertion to sort slice.
-func InsertionSort[T any](slice []T, comparator lancetconstraints.Comparator) []T {
-	size := len(slice)
-	if size <= 1 {
-		return slice
-	}
-
-	for i := 1; i < size; i++ {
-		currentItem := slice[i]
-		preIndex := i - 1
-		preItem := slice[preIndex]
-
-		isPreLessThanCurrent := comparator.Compare(preItem, currentItem) == -1
-		for preIndex >= 0 && isPreLessThanCurrent {
-			slice[preIndex+1] = slice[preIndex]
-			preIndex--
-		}
-
-		slice[preIndex+1] = preItem
-	}
-
-	return slice
-}
-
-// SelectionSort use selection to sort slice.
-func SelectionSort[T any](slice []T, comparator lancetconstraints.Comparator) []T {
-	for i := 0; i < len(slice); i++ {
-		min := i
-
-		for j := i + 1; j < len(slice); j++ {
-			if comparator.Compare(slice[j], slice[min]) == -1 {
-				min = j
-			}
-		}
-		swap(slice, i, min)
-	}
-	return slice
-}
-
-// ShellSort shell sort slice.
-func ShellSort[T any](slice []T, comparator lancetconstraints.Comparator) []T {
-	size := len(slice)
-	if size <= 1 {
-		return slice
-	}
-
-	gap := 1
-	for gap < size/3 {
-		gap = 3*gap + 1
-	}
-
-	for gap >= 1 {
-		for i := gap; i < size; i++ {
-			for j := i; j >= gap && comparator.Compare(slice[j], slice[j-gap]) == -1; j -= gap {
-				swap(slice, j, j-gap)
-			}
-		}
-		gap /= 3
-	}
-
-	return slice
-}
-
-// QuickSort quick sorting for slice, lowIndex is 0 and highIndex is len(slice)-1
-func QuickSort[T any](slice []T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) []T {
-	if lowIndex < highIndex {
-		p := partition(slice, lowIndex, highIndex, comparator)
-		QuickSort(slice, lowIndex, p-1, comparator)
-		QuickSort(slice, p+1, highIndex, comparator)
-	}
-
-	return slice
-}
-
-// partition split slice into two parts
-func partition[T any](slice []T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) int {
-	p := slice[highIndex]
-	i := lowIndex
-	for j := lowIndex; j < highIndex; j++ {
-		if comparator.Compare(slice[j], p) == -1 { //slice[j] < p
-			swap(slice, i, j)
-			i++
-		}
-	}
-
-	swap(slice, i, highIndex)
-
-	return i
-}
-
-// HeapSort use heap to sort slice
-func HeapSort[T any](slice []T, comparator lancetconstraints.Comparator) []T {
-	size := len(slice)
-
-	for i := size/2 - 1; i >= 0; i-- {
-		sift(slice, i, size-1, comparator)
-	}
-	for j := size - 1; j > 0; j-- {
-		swap(slice, 0, j)
-		sift(slice, 0, j-1, comparator)
-	}
-
-	return slice
-}
-
-func sift[T any](slice []T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) {
-	i := lowIndex
-	j := 2*i + 1
-
-	temp := slice[i]
-	for j <= highIndex {
-		if j < highIndex && comparator.Compare(slice[j], slice[j+1]) == -1 { //slice[j] < slice[j+1]
-			j++
-		}
-		if comparator.Compare(temp, slice[j]) == -1 { //tmp < slice[j]
-			slice[i] = slice[j]
-			i = j
-			j = 2*i + 1
-		} else {
-			break
-		}
-	}
-	slice[i] = temp
-}
-
-// MergeSort merge sorting for slice
-func MergeSort[T any](slice []T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) []T {
-	if lowIndex < highIndex {
-		mid := (lowIndex + highIndex) / 2
-		MergeSort(slice, lowIndex, mid, comparator)
-		MergeSort(slice, mid+1, highIndex, comparator)
-		merge(slice, lowIndex, mid, highIndex, comparator)
-	}
-
-	return slice
-}
-
-func merge[T any](slice []T, lowIndex, midIndex, highIndex int, comparator lancetconstraints.Comparator) {
-	i := lowIndex
-	j := midIndex + 1
-	temp := []T{}
-
-	for i <= midIndex && j <= highIndex {
-		//slice[i] < slice[j]
-		if comparator.Compare(slice[i], slice[j]) == -1 {
-			temp = append(temp, slice[i])
-			i++
-		} else {
-			temp = append(temp, slice[j])
-			j++
-		}
-	}
-
-	if i <= midIndex {
-		temp = append(temp, slice[i:midIndex+1]...)
-	} else {
-		temp = append(temp, slice[j:highIndex+1]...)
-	}
-
-	for k := 0; k < len(temp); k++ {
-		slice[lowIndex+k] = temp[k]
-	}
-}
-
-// CountSort use count sorting for slice
-func CountSort[T any](slice []T, comparator lancetconstraints.Comparator) []T {
-	size := len(slice)
-	out := make([]T, size)
-
-	for i := 0; i < size; i++ {
-		count := 0
-		for j := 0; j < size; j++ {
-			//slice[i] > slice[j]
-			if comparator.Compare(slice[i], slice[j]) == 1 {
-				count++
-			}
-		}
-		out[count] = slice[i]
-	}
-
-	return out
-}
-
-// swap two slice value at index i and j
-func swap[T any](slice []T, i, j int) {
-	slice[i], slice[j] = slice[j], slice[i]
-}
--- a/algorithm/sorter_test.go
+++ b/algorithm/sorter_test.go
@@ -1,177 +0,0 @@
-package algorithm
-
-import (
-	"fmt"
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-// People test mock data
-type people struct {
-	Name string
-	Age  int
-}
-
-// PeopleAageComparator sort people slice by age field
-type peopleAgeComparator struct{}
-
-// Compare implements github.com/duke-git/lancet/v2/lancetconstraints/constraints.go/Comparator
-func (pc *peopleAgeComparator) Compare(v1 any, v2 any) int {
-	p1, _ := v1.(people)
-	p2, _ := v2.(people)
-
-	//ascending order
-	if p1.Age < p2.Age {
-		return -1
-	} else if p1.Age > p2.Age {
-		return 1
-	}
-	return 0
-
-	//decending order
-	// if p1.Age > p2.Age {
-	// 	return -1
-	// } else if p1.Age < p2.Age {
-	// 	return 1
-	// }
-}
-
-var peoples = []people{
-	{Name: "a", Age: 20},
-	{Name: "b", Age: 10},
-	{Name: "c", Age: 17},
-	{Name: "d", Age: 8},
-	{Name: "e", Age: 28},
-}
-
-type intComparator struct{}
-
-func (c *intComparator) Compare(v1 any, v2 any) int {
-	val1, _ := v1.(int)
-	val2, _ := v2.(int)
-
-	//ascending order
-	if val1 < val2 {
-		return -1
-	} else if val1 > val2 {
-		return 1
-	}
-	return 0
-}
-
-var intSlice = []int{2, 1, 5, 3, 6, 4}
-
-func TestBubbleSortForStructSlice(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestBubbleSortForStructSlice")
-
-	comparator := &peopleAgeComparator{}
-	sortedPeopleByAge := BubbleSort(peoples, comparator)
-	t.Log(sortedPeopleByAge)
-
-	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
-	actual := fmt.Sprintf("%v", sortedPeopleByAge)
-
-	asssert.Equal(expected, actual)
-}
-
-func TestBubbleSortForIntSlice(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestBubbleSortForIntSlice")
-
-	comparator := &intComparator{}
-	sortedInt := BubbleSort(intSlice, comparator)
-	expected := []int{1, 2, 3, 4, 5, 6}
-
-	asssert.Equal(expected, sortedInt)
-}
-
-func TestInsertionSort(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestInsertionSort")
-
-	comparator := &peopleAgeComparator{}
-	sortedPeopleByAge := SelectionSort(peoples, comparator)
-	t.Log(sortedPeopleByAge)
-
-	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
-	actual := fmt.Sprintf("%v", sortedPeopleByAge)
-
-	asssert.Equal(expected, actual)
-}
-
-func TestSelectionSort(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestSelectionSort")
-
-	comparator := &peopleAgeComparator{}
-	sortedPeopleByAge := SelectionSort(peoples, comparator)
-	t.Log(sortedPeopleByAge)
-
-	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
-	actual := fmt.Sprintf("%v", sortedPeopleByAge)
-
-	asssert.Equal(expected, actual)
-}
-
-func TestShellSort(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestShellSort")
-
-	comparator := &peopleAgeComparator{}
-	sortedPeopleByAge := ShellSort(peoples, comparator)
-	t.Log(sortedPeopleByAge)
-
-	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
-	actual := fmt.Sprintf("%v", sortedPeopleByAge)
-
-	asssert.Equal(expected, actual)
-}
-
-func TestQuickSort(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestQuickSort")
-
-	comparator := &peopleAgeComparator{}
-	sortedPeopleByAge := QuickSort(peoples, 0, len(peoples)-1, comparator)
-	t.Log(sortedPeopleByAge)
-
-	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
-	actual := fmt.Sprintf("%v", sortedPeopleByAge)
-
-	asssert.Equal(expected, actual)
-}
-
-func TestHeapSort(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestHeapSort")
-
-	comparator := &peopleAgeComparator{}
-	sortedPeopleByAge := HeapSort(peoples, comparator)
-	t.Log(sortedPeopleByAge)
-
-	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
-	actual := fmt.Sprintf("%v", sortedPeopleByAge)
-
-	asssert.Equal(expected, actual)
-}
-
-func TestMergeSort(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestMergeSort")
-
-	comparator := &peopleAgeComparator{}
-	sortedPeopleByAge := MergeSort(peoples, 0, len(peoples)-1, comparator)
-	t.Log(sortedPeopleByAge)
-
-	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
-	actual := fmt.Sprintf("%v", sortedPeopleByAge)
-
-	asssert.Equal(expected, actual)
-}
-
-func TestCountSort(t *testing.T) {
-	asssert := internal.NewAssert(t, "TestCountSort")
-
-	comparator := &peopleAgeComparator{}
-	sortedPeopleByAge := CountSort(peoples, comparator)
-	t.Log(sortedPeopleByAge)
-
-	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
-	actual := fmt.Sprintf("%v", sortedPeopleByAge)
-
-	asssert.Equal(expected, actual)
-}
--- a/compare/compare.go
+++ b/compare/compare.go
@@ -0,0 +1,58 @@
+// Copyright 2023 dudaodong@gmail.com. All rights resulterved.
+// Use of this source code is governed by MIT license
+
+// Package compare provides a lightweight comparison function on interface{} type.
+// reference: https://github.com/stretchr/testify
+package compare
+
+import (
+	"reflect"
+	"time"
+
+	"github.com/duke-git/lancet/convertor"
+)
+
+// operator type
+const (
+	equal          = "eq"
+	lessThan       = "lt"
+	greaterThan    = "gt"
+	lessOrEqual    = "le"
+	greaterOrEqual = "ge"
+)
+
+var (
+	timeType  = reflect.TypeOf(time.Time{})
+	bytesType = reflect.TypeOf([]byte{})
+)
+
+// Equal checks if two values are equal or not. (check both type and value)
+func Equal(left, right interface{}) bool {
+	return compareValue(equal, left, right)
+}
+
+// EqualValue checks if two values are equal or not. (check value only)
+func EqualValue(left, right interface{}) bool {
+	ls, rs := convertor.ToString(left), convertor.ToString(right)
+	return ls == rs
+}
+
+// LessThan checks if value `left` less than value `right`.
+func LessThan(left, right interface{}) bool {
+	return compareValue(lessThan, left, right)
+}
+
+// GreaterThan checks if value `left` greater than value `right`.
+func GreaterThan(left, right interface{}) bool {
+	return compareValue(greaterThan, left, right)
+}
+
+// LessOrEqual checks if value `left` less than or equal to value `right`.
+func LessOrEqual(left, right interface{}) bool {
+	return compareValue(lessOrEqual, left, right)
+}
+
+// GreaterOrEqual checks if value `left` greater than or equal to value `right`.
+func GreaterOrEqual(left, right interface{}) bool {
+	return compareValue(greaterOrEqual, left, right)
+}
--- a/compare/compare_example_test.go
+++ b/compare/compare_example_test.go
@@ -0,0 +1,170 @@
+package compare
+
+import (
+	"fmt"
+	"time"
+)
+
+func ExampleEqual() {
+	result1 := Equal(1, 1)
+	result2 := Equal("1", "1")
+	result3 := Equal([]int{1, 2, 3}, []int{1, 2, 3})
+	result4 := Equal(map[int]string{1: "a", 2: "b"}, map[int]string{1: "a", 2: "b"})
+
+	result5 := Equal(1, "1")
+	result6 := Equal(1, int64(1))
+	result7 := Equal([]int{1, 2}, []int{1, 2, 3})
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+	fmt.Println(result4)
+	fmt.Println(result5)
+	fmt.Println(result6)
+	fmt.Println(result7)
+
+	// Output:
+	// true
+	// true
+	// true
+	// true
+	// false
+	// false
+	// false
+}
+
+func ExampleEqualValue() {
+	result1 := EqualValue(1, 1)
+	result2 := EqualValue(int(1), int64(1))
+	result3 := EqualValue(1, "1")
+	result4 := EqualValue(1, "2")
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+	fmt.Println(result4)
+
+	// Output:
+	// true
+	// true
+	// true
+	// false
+}
+
+func ExampleLessThan() {
+	result1 := LessThan(1, 2)
+	result2 := LessThan(1.1, 2.2)
+	result3 := LessThan("a", "b")
+
+	time1 := time.Now()
+	time2 := time1.Add(time.Second)
+	result4 := LessThan(time1, time2)
+
+	result5 := LessThan(2, 1)
+	result6 := LessThan(1, int64(2))
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+	fmt.Println(result4)
+	fmt.Println(result5)
+	fmt.Println(result6)
+
+	// Output:
+	// true
+	// true
+	// true
+	// true
+	// false
+	// false
+}
+
+func ExampleGreaterThan() {
+	result1 := GreaterThan(2, 1)
+	result2 := GreaterThan(2.2, 1.1)
+	result3 := GreaterThan("b", "a")
+
+	time1 := time.Now()
+	time2 := time1.Add(time.Second)
+	result4 := GreaterThan(time2, time1)
+
+	result5 := GreaterThan(1, 2)
+	result6 := GreaterThan(int64(2), 1)
+	result7 := GreaterThan("b", "c")
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+	fmt.Println(result4)
+	fmt.Println(result5)
+	fmt.Println(result6)
+	fmt.Println(result7)
+
+	// Output:
+	// true
+	// true
+	// true
+	// true
+	// false
+	// false
+	// false
+}
+
+func ExampleLessOrEqual() {
+	result1 := LessOrEqual(1, 1)
+	result2 := LessOrEqual(1.1, 2.2)
+	result3 := LessOrEqual("a", "b")
+
+	time1 := time.Now()
+	time2 := time1.Add(time.Second)
+	result4 := LessOrEqual(time1, time2)
+
+	result5 := LessOrEqual(2, 1)
+	result6 := LessOrEqual(1, int64(2))
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+	fmt.Println(result4)
+	fmt.Println(result5)
+	fmt.Println(result6)
+
+	// Output:
+	// true
+	// true
+	// true
+	// true
+	// false
+	// false
+}
+
+func ExampleGreaterOrEqual() {
+	result1 := GreaterOrEqual(1, 1)
+	result2 := GreaterOrEqual(2.2, 1.1)
+	result3 := GreaterOrEqual("b", "b")
+
+	time1 := time.Now()
+	time2 := time1.Add(time.Second)
+	result4 := GreaterOrEqual(time2, time1)
+
+	result5 := GreaterOrEqual(1, 2)
+	result6 := GreaterOrEqual(int64(2), 1)
+	result7 := GreaterOrEqual("b", "c")
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+	fmt.Println(result4)
+	fmt.Println(result5)
+	fmt.Println(result6)
+	fmt.Println(result7)
+
+	// Output:
+	// true
+	// true
+	// true
+	// true
+	// false
+	// false
+	// false
+}
--- a/compare/compare_internal.go
+++ b/compare/compare_internal.go
@@ -0,0 +1,297 @@
+package compare
+
+import (
+	"bytes"
+	"encoding/json"
+	"math/big"
+	"reflect"
+	"time"
+
+	"github.com/duke-git/lancet/convertor"
+)
+
+func compareValue(operator string, left, right interface{}) bool {
+	leftType, rightType := reflect.TypeOf(left), reflect.TypeOf(right)
+
+	if leftType.Kind() != rightType.Kind() {
+		return false
+	}
+
+	switch leftType.Kind() {
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
+		reflect.Float32, reflect.Float64, reflect.Bool, reflect.String:
+		return compareBasicValue(operator, left, right)
+
+	case reflect.Struct, reflect.Slice, reflect.Map:
+		return compareRefValue(operator, left, right, leftType.Kind())
+	}
+
+	return false
+}
+
+func compareRefValue(operator string, leftObj, rightObj interface{}, kind reflect.Kind) bool {
+	leftVal, rightVal := reflect.ValueOf(leftObj), reflect.ValueOf(rightObj)
+
+	switch kind {
+	case reflect.Struct:
+
+		// compare time
+		// fix: issue #275
+		if canConvert(leftObj, timeType) {
+			timeObj1, ok := leftObj.(time.Time)
+			if !ok {
+				timeObj1 = leftVal.Convert(timeType).Interface().(time.Time)
+			}
+
+			timeObj2, ok := rightObj.(time.Time)
+			if !ok {
+				timeObj2 = rightVal.Convert(timeType).Interface().(time.Time)
+			}
+
+			return compareBasicValue(operator, timeObj1.UnixNano(), timeObj2.UnixNano())
+		}
+
+		// for other struct type, only process equal operator
+		switch operator {
+		case equal:
+			return objectsAreEqualValues(leftObj, rightObj)
+		}
+
+	case reflect.Slice:
+		// compare []byte
+		if canConvert(leftObj, bytesType) {
+			bytesObj1, ok := leftObj.([]byte)
+			if !ok {
+				bytesObj1 = leftVal.Convert(bytesType).Interface().([]byte)
+			}
+			bytesObj2, ok := rightObj.([]byte)
+			if !ok {
+				bytesObj2 = rightVal.Convert(bytesType).Interface().([]byte)
+			}
+
+			switch operator {
+			case equal:
+				if bytes.Compare(bytesObj1, bytesObj2) == 0 {
+					return true
+				}
+			case lessThan:
+				if bytes.Compare(bytesObj1, bytesObj2) == -1 {
+					return true
+				}
+			case greaterThan:
+				if bytes.Compare(bytesObj1, bytesObj2) == 1 {
+					return true
+				}
+			case lessOrEqual:
+				if bytes.Compare(bytesObj1, bytesObj2) <= 0 {
+					return true
+				}
+			case greaterOrEqual:
+				if bytes.Compare(bytesObj1, bytesObj2) >= 0 {
+					return true
+				}
+			}
+
+		}
+
+		// for other type slice, only process equal operator
+		switch operator {
+		case equal:
+			return reflect.DeepEqual(leftObj, rightObj)
+		}
+
+	case reflect.Map:
+		// only process equal operator
+		switch operator {
+		case equal:
+			return reflect.DeepEqual(leftObj, rightObj)
+		}
+	}
+
+	return false
+}
+
+func objectsAreEqualValues(expected, actual interface{}) bool {
+	if objectsAreEqual(expected, actual) {
+		return true
+	}
+
+	actualType := reflect.TypeOf(actual)
+	if actualType == nil {
+		return false
+	}
+	expectedValue := reflect.ValueOf(expected)
+	if expectedValue.IsValid() && expectedValue.Type().ConvertibleTo(actualType) {
+		// Attempt comparison after type conversion
+		return reflect.DeepEqual(expectedValue.Convert(actualType).Interface(), actual)
+	}
+
+	return false
+}
+
+func objectsAreEqual(expected, actual interface{}) bool {
+	if expected == nil || actual == nil {
+		return expected == actual
+	}
+
+	exp, ok := expected.([]byte)
+	if !ok {
+		return reflect.DeepEqual(expected, actual)
+	}
+
+	act, ok := actual.([]byte)
+	if !ok {
+		return false
+	}
+	if exp == nil || act == nil {
+		return exp == nil && act == nil
+	}
+	return bytes.Equal(exp, act)
+}
+
+// compareBasic compare basic value: integer, float, string, bool
+func compareBasicValue(operator string, leftValue, rightValue interface{}) bool {
+	if leftValue == nil && rightValue == nil && operator == equal {
+		return true
+	}
+
+	switch leftVal := leftValue.(type) {
+	case int, uint, int8, uint8, int16, uint16, int32, uint32, int64, uint64:
+		left, err := convertor.ToBigInt(leftValue)
+		if err != nil {
+			return false
+		}
+
+		right, err := convertor.ToBigInt(rightValue)
+		if err != nil {
+			return false
+		}
+
+		return compareBigInt(operator, left, right)
+
+	case float32, float64:
+		left, err := convertor.ToFloat(leftValue)
+		if err != nil {
+			return false
+		}
+		right, err := convertor.ToFloat(rightValue)
+		if err != nil {
+			return false
+		}
+
+		return compareFloats(operator, left, right)
+
+	case string:
+		left := leftVal
+		switch right := rightValue.(type) {
+		case string:
+			return compareStrings(operator, left, right)
+		}
+
+	case bool:
+		left := leftVal
+		switch right := rightValue.(type) {
+		case bool:
+			return compareBools(operator, left, right)
+		}
+
+	case json.Number:
+		if left, err := leftVal.Float64(); err == nil {
+			switch rightVal := rightValue.(type) {
+			case json.Number:
+				if right, err := rightVal.Float64(); err == nil {
+					return compareFloats(operator, left, right)
+				}
+			case float32, float64:
+				right, err := convertor.ToFloat(rightValue)
+				if err != nil {
+					return false
+				}
+				return compareFloats(operator, left, right)
+
+			case int, uint, int8, uint8, int16, uint16, int32, uint32, int64, uint64:
+				right, err := convertor.ToBigInt(rightValue)
+				if err != nil {
+					return false
+				}
+				left, err := convertor.ToBigInt(left)
+				return compareBigInt(operator, left, right)
+			}
+		}
+	}
+
+	return false
+}
+
+// compareBigInt compares two big.Int values based on the operator
+func compareBigInt(operator string, left, right *big.Int) bool {
+	switch operator {
+	case equal:
+		return left.Cmp(right) == 0
+	case lessThan:
+		return left.Cmp(right) < 0
+	case greaterThan:
+		return left.Cmp(right) > 0
+	case lessOrEqual:
+		return left.Cmp(right) <= 0
+	case greaterOrEqual:
+		return left.Cmp(right) >= 0
+	}
+	return false
+}
+
+// compareFloats compares two float64 values based on the operator
+func compareFloats(operator string, left, right float64) bool {
+	switch operator {
+	case equal:
+		return left == right
+	case lessThan:
+		return left < right
+	case greaterThan:
+		return left > right
+	case lessOrEqual:
+		return left <= right
+	case greaterOrEqual:
+		return left >= right
+	}
+	return false
+}
+
+// compareStrings compares two string values based on the operator
+func compareStrings(operator string, left, right string) bool {
+	switch operator {
+	case equal:
+		return left == right
+	case lessThan:
+		return left < right
+	case greaterThan:
+		return left > right
+	case lessOrEqual:
+		return left <= right
+	case greaterOrEqual:
+		return left >= right
+	}
+	return false
+}
+
+// compareBools compares two boolean values based on the operator
+func compareBools(operator string, left, right bool) bool {
+	switch operator {
+	case equal:
+		return left == right
+	}
+	return false
+}
+
+// canConvert checks if the value can be converted to the target type
+func canConvert(value interface{}, targetType reflect.Type) bool {
+	v := reflect.ValueOf(value)
+
+	defer func() {
+		if r := recover(); r != nil {
+		}
+	}()
+	v.Convert(targetType)
+	return true
+}
--- a/compare/compare_test.go
+++ b/compare/compare_test.go
@@ -0,0 +1,145 @@
+package compare
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+
+	"github.com/duke-git/lancet/internal"
+)
+
+func TestEqual(t *testing.T) {
+	assert := internal.NewAssert(t, "TestEqual")
+
+	assert.Equal(true, Equal(1, 1))
+	assert.Equal(true, Equal(int64(1), int64(1)))
+	assert.Equal(true, Equal("a", "a"))
+	assert.Equal(true, Equal(true, true))
+	assert.Equal(true, Equal([]int{1, 2, 3}, []int{1, 2, 3}))
+	assert.Equal(true, Equal(map[int]string{1: "a", 2: "b"}, map[int]string{1: "a", 2: "b"}))
+
+	assert.Equal(false, Equal(1, 2))
+	assert.Equal(false, Equal(1, int64(1)))
+	assert.Equal(false, Equal("a", "b"))
+	assert.Equal(false, Equal(true, false))
+	assert.Equal(false, Equal([]int{1, 2}, []int{1, 2, 3}))
+	assert.Equal(false, Equal(map[int]string{1: "a", 2: "b"}, map[int]string{1: "a"}))
+
+	time1 := time.Now()
+	time2 := time1.Add(time.Second)
+	time3 := time1.Add(time.Second)
+
+	assert.Equal(false, Equal(time1, time2))
+	assert.Equal(true, Equal(time2, time3))
+
+	st1 := struct {
+		A string
+		B string
+	}{
+		A: "a",
+		B: "b",
+	}
+
+	st2 := struct {
+		A string
+		B string
+	}{
+		A: "a",
+		B: "b",
+	}
+
+	st3 := struct {
+		A string
+		B string
+	}{
+		A: "a1",
+		B: "b",
+	}
+
+	assert.Equal(true, Equal(st1, st2))
+	assert.Equal(false, Equal(st1, st3))
+}
+
+func TestEqualValue(t *testing.T) {
+	assert := internal.NewAssert(t, "TestEqualValue")
+
+	assert.Equal(true, EqualValue(1, 1))
+	assert.Equal(true, EqualValue(int(1), int64(1)))
+	assert.Equal(true, EqualValue(1, "1"))
+
+	assert.Equal(false, EqualValue(1, "2"))
+}
+
+func TestLessThan(t *testing.T) {
+	t.Parallel()
+	assert := internal.NewAssert(t, "TestLessThan")
+
+	tests := []struct {
+		left  interface{}
+		right interface{}
+		want  bool
+	}{
+		{1, 2, true},
+		{1.1, 2.2, true},
+		{"a", "b", true},
+		{time.Now(), time.Now().Add(time.Second), true},
+		{[]byte("hello1"), []byte("hello2"), true},
+		{json.Number("123"), json.Number("124"), true},
+		{645680099112988673, 645680099112988675, true},
+		{1, 1, false},
+		{1, int64(1), false},
+	}
+
+	for _, tt := range tests {
+		assert.Equal(tt.want, LessThan(tt.left, tt.right))
+	}
+}
+
+func TestGreaterThan(t *testing.T) {
+	assert := internal.NewAssert(t, "TestGreaterThan")
+
+	assert.Equal(true, GreaterThan(2, 1))
+	assert.Equal(true, GreaterThan(2.2, 1.1))
+	assert.Equal(true, GreaterThan("b", "a"))
+
+	time1 := time.Now()
+	time2 := time1.Add(time.Second)
+	assert.Equal(true, GreaterThan(time2, time1))
+
+	assert.Equal(false, GreaterThan(1, 2))
+	assert.Equal(false, GreaterThan(int64(2), 1))
+	assert.Equal(false, GreaterThan("b", "c"))
+}
+
+func TestLessOrEqual(t *testing.T) {
+	assert := internal.NewAssert(t, "TestLessOrEqual")
+
+	assert.Equal(true, LessOrEqual(1, 2))
+	assert.Equal(true, LessOrEqual(1, 1))
+	assert.Equal(true, LessOrEqual(1.1, 2.2))
+	assert.Equal(true, LessOrEqual("a", "b"))
+
+	time1 := time.Now()
+	time2 := time1.Add(time.Second)
+	assert.Equal(true, LessOrEqual(time1, time2))
+
+	assert.Equal(false, LessOrEqual(2, 1))
+	assert.Equal(false, LessOrEqual(1, int64(2)))
+}
+
+func TestGreaterOrEqual(t *testing.T) {
+	assert := internal.NewAssert(t, "TestGreaterThan")
+
+	assert.Equal(true, GreaterOrEqual(2, 1))
+	assert.Equal(true, GreaterOrEqual(1, 1))
+	assert.Equal(true, GreaterOrEqual(2.2, 1.1))
+	assert.Equal(true, GreaterOrEqual("b", "b"))
+
+	time1 := time.Now()
+	time2 := time1.Add(time.Second)
+	assert.Equal(true, GreaterOrEqual(time2, time1))
+
+	assert.Equal(false, GreaterOrEqual(1, 2))
+	assert.Equal(false, GreaterOrEqual(int64(2), 1))
+	assert.Equal(false, GreaterOrEqual("b", "c"))
+}
--- a/convertor/convertor.go
+++ b/convertor/convertor.go
@@ -6,13 +6,22 @@ package convertor

 import (
 	"bytes"
+	"encoding/base64"
+	"encoding/binary"
 	"encoding/gob"
 	"encoding/json"
+	"errors"
 	"fmt"
+	"io"
+	"math"
+	"math/big"
 	"reflect"
 	"regexp"
 	"strconv"
 	"strings"
+
+	"golang.org/x/text/encoding/simplifiedchinese"
+	"golang.org/x/text/transform"
 )

 // ToBool convert string to a boolean
@@ -21,14 +30,44 @@ func ToBool(s string) (bool, error) {
 }

 // ToBytes convert interface to bytes
-func ToBytes(data any) ([]byte, error) {
-	var buf bytes.Buffer
-	enc := gob.NewEncoder(&buf)
-	err := enc.Encode(data)
-	if err != nil {
-		return nil, err
+func ToBytes(value interface{}) ([]byte, error) {
+	v := reflect.ValueOf(value)
+
+	switch value.(type) {
+	case int, int8, int16, int32, int64:
+		number := v.Int()
+		buf := bytes.NewBuffer([]byte{})
+		buf.Reset()
+		err := binary.Write(buf, binary.BigEndian, number)
+		return buf.Bytes(), err
+	case uint, uint8, uint16, uint32, uint64:
+		number := v.Uint()
+		buf := bytes.NewBuffer([]byte{})
+		buf.Reset()
+		err := binary.Write(buf, binary.BigEndian, number)
+		return buf.Bytes(), err
+	case float32:
+		number := float32(v.Float())
+		bits := math.Float32bits(number)
+		bytes := make([]byte, 4)
+		binary.BigEndian.PutUint32(bytes, bits)
+		return bytes, nil
+	case float64:
+		number := v.Float()
+		bits := math.Float64bits(number)
+		bytes := make([]byte, 8)
+		binary.BigEndian.PutUint64(bytes, bits)
+		return bytes, nil
+	case bool:
+		return strconv.AppendBool([]byte{}, v.Bool()), nil
+	case string:
+		return []byte(v.String()), nil
+	case []byte:
+		return v.Bytes(), nil
+	default:
+		newValue, err := json.Marshal(value)
+		return newValue, err
 	}
-	return buf.Bytes(), nil
 }

 // ToChar convert string to char slice
@@ -44,39 +83,51 @@ func ToChar(s string) []string {
 }

 // ToString convert value to string
-func ToString(value any) string {
-	res := ""
+func ToString(value interface{}) string {
 	if value == nil {
-		return res
+		return ""
 	}

-	v := reflect.ValueOf(value)
-
-	switch value.(type) {
-	case float32, float64:
-		res = strconv.FormatFloat(v.Float(), 'f', -1, 64)
-		return res
-	case int, int8, int16, int32, int64:
-		res = strconv.FormatInt(v.Int(), 10)
-		return res
-	case uint, uint8, uint16, uint32, uint64:
-		res = strconv.FormatUint(v.Uint(), 10)
-		return res
+	switch val := value.(type) {
+	case float32:
+		return strconv.FormatFloat(float64(val), 'f', -1, 32)
+	case float64:
+		return strconv.FormatFloat(val, 'f', -1, 64)
+	case int:
+		return strconv.FormatInt(int64(val), 10)
+	case int8:
+		return strconv.FormatInt(int64(val), 10)
+	case int16:
+		return strconv.FormatInt(int64(val), 10)
+	case int32:
+		return strconv.FormatInt(int64(val), 10)
+	case int64:
+		return strconv.FormatInt(val, 10)
+	case uint:
+		return strconv.FormatUint(uint64(val), 10)
+	case uint8:
+		return strconv.FormatUint(uint64(val), 10)
+	case uint16:
+		return strconv.FormatUint(uint64(val), 10)
+	case uint32:
+		return strconv.FormatUint(uint64(val), 10)
+	case uint64:
+		return strconv.FormatUint(val, 10)
 	case string:
-		res = v.String()
-		return res
+		return val
 	case []byte:
-		res = string(v.Bytes())
-		return res
+		return string(val)
 	default:
-		newValue, _ := json.Marshal(value)
-		res = string(newValue)
-		return res
+		b, err := json.Marshal(val)
+		if err != nil {
+			return ""
+		}
+		return string(b)
 	}
 }

 // ToJson convert value to a valid json string
-func ToJson(value any) (string, error) {
+func ToJson(value interface{}) (string, error) {
 	res, err := json.Marshal(value)
 	if err != nil {
 		return "", err
@@ -86,7 +137,7 @@ func ToJson(value any) (string, error) {
 }

 // ToFloat convert value to a float64, if input is not a float return 0.0 and error
-func ToFloat(value any) (float64, error) {
+func ToFloat(value interface{}) (float64, error) {
 	v := reflect.ValueOf(value)

 	res := 0.0
@@ -113,7 +164,7 @@ func ToFloat(value any) (float64, error) {
 }

 // ToInt convert value to a int64, if input is not a numeric format return 0 and error
-func ToInt(value any) (int64, error) {
+func ToInt(value interface{}) (int64, error) {
 	v := reflect.ValueOf(value)

 	var res int64
@@ -141,18 +192,19 @@ func ToInt(value any) (int64, error) {

 // StructToMap convert struct to map, only convert exported struct field
 // map key is specified same as struct field tag `json` value
-func StructToMap(value any) (map[string]any, error) {
+func StructToMap(value interface{}) (map[string]interface{}, error) {
 	v := reflect.ValueOf(value)
 	t := reflect.TypeOf(value)

 	if t.Kind() == reflect.Ptr {
 		t = t.Elem()
+		v = v.Elem()
 	}
 	if t.Kind() != reflect.Struct {
 		return nil, fmt.Errorf("data type %T not support, shuld be struct or pointer to struct", value)
 	}

-	res := make(map[string]any)
+	res := make(map[string]interface{})

 	fieldNum := t.NumField()
 	pattern := `^[A-Z]`
@@ -198,3 +250,247 @@ func ColorRGBToHex(red, green, blue int) string {

 	return "#" + r + g + b
 }
+
+// ToChannel convert a array of elements to a read-only channels
+func ToChannel(array []interface{}) <-chan interface{} {
+	ch := make(chan interface{})
+
+	go func() {
+		for _, item := range array {
+			ch <- item
+		}
+		close(ch)
+	}()
+
+	return ch
+}
+
+// EncodeByte encode data to byte
+func EncodeByte(data interface{}) ([]byte, error) {
+	buffer := bytes.NewBuffer(nil)
+	encoder := gob.NewEncoder(buffer)
+	err := encoder.Encode(data)
+	if err != nil {
+		return nil, err
+	}
+	return buffer.Bytes(), nil
+}
+
+// DecodeByte decode byte data to target object
+func DecodeByte(data []byte, target interface{}) error {
+	buffer := bytes.NewBuffer(data)
+	decoder := gob.NewDecoder(buffer)
+	return decoder.Decode(target)
+}
+
+// DeepClone creates a deep copy of passed item.
+// can't clone unexported field of struct
+func DeepClone(src interface{}) interface{} {
+	c := cloner{
+		ptrs: map[reflect.Type]map[uintptr]reflect.Value{},
+	}
+	result := c.clone(reflect.ValueOf(src))
+	if result.Kind() == reflect.Invalid {
+		return nil
+	}
+
+	return result.Interface()
+}
+
+// CopyProperties copies each field from the source into the destination. It recursively copies struct pointers and interfaces that contain struct pointers.
+// use json.Marshal/Unmarshal, so json tag should be set for fields of dst and src struct.
+func CopyProperties(dst, src interface{}) error {
+	dstType, srcType := reflect.TypeOf(dst), reflect.TypeOf(src)
+
+	if dstType.Kind() != reflect.Ptr || dstType.Elem().Kind() != reflect.Struct {
+		return errors.New("CopyProperties: parameter dst should be struct pointer")
+	}
+
+	if srcType.Kind() == reflect.Ptr {
+		srcType = srcType.Elem()
+	}
+	if srcType.Kind() != reflect.Struct {
+		return errors.New("CopyProperties: parameter src should be a struct or struct pointer")
+	}
+
+	bytes, err := json.Marshal(src)
+	if err != nil {
+		return fmt.Errorf("CopyProperties: unable to marshal src: %s", err)
+	}
+	err = json.Unmarshal(bytes, dst)
+	if err != nil {
+		return fmt.Errorf("CopyProperties: unable to unmarshal into dst: %s", err)
+	}
+
+	return nil
+}
+
+// ToInterface converts reflect value to its interface type.
+func ToInterface(v reflect.Value) (value interface{}, ok bool) {
+	if v.IsValid() && v.CanInterface() {
+		return v.Interface(), true
+	}
+	switch v.Kind() {
+	case reflect.Bool:
+		return v.Bool(), true
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return v.Int(), true
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return v.Uint(), true
+	case reflect.Float32, reflect.Float64:
+		return v.Float(), true
+	case reflect.Complex64, reflect.Complex128:
+		return v.Complex(), true
+	case reflect.String:
+		return v.String(), true
+	case reflect.Ptr:
+		return ToInterface(v.Elem())
+	case reflect.Interface:
+		return ToInterface(v.Elem())
+	default:
+		return nil, false
+	}
+}
+
+// Utf8ToGbk convert utf8 encoding data to GBK encoding data.
+func Utf8ToGbk(bs []byte) ([]byte, error) {
+	r := transform.NewReader(bytes.NewReader(bs), simplifiedchinese.GBK.NewEncoder())
+	b, err := io.ReadAll(r)
+	return b, err
+}
+
+// GbkToUtf8 convert GBK encoding data to utf8 encoding data.
+func GbkToUtf8(bs []byte) ([]byte, error) {
+	r := transform.NewReader(bytes.NewReader(bs), simplifiedchinese.GBK.NewDecoder())
+	b, err := io.ReadAll(r)
+	return b, err
+}
+
+// MapToStruct converts map to struct
+func MapToStruct(m map[string]interface{}, structObj interface{}) error {
+	for k, v := range m {
+		err := setStructField(structObj, k, v)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// ToStdBase64 convert data to standard base64 encoding.
+func ToStdBase64(value interface{}) string {
+	if value == nil || (reflect.ValueOf(value).Kind() == reflect.Ptr && reflect.ValueOf(value).IsNil()) {
+		return ""
+	}
+	switch value.(type) {
+	case []byte:
+		return base64.StdEncoding.EncodeToString(value.([]byte))
+	case string:
+		return base64.StdEncoding.EncodeToString([]byte(value.(string)))
+	case error:
+		return base64.StdEncoding.EncodeToString([]byte(value.(error).Error()))
+	default:
+		marshal, err := json.Marshal(value)
+		if err != nil {
+			return ""
+		}
+		return base64.StdEncoding.EncodeToString(marshal)
+	}
+}
+
+// ToUrlBase64 convert data to URL base64 encoding.
+func ToUrlBase64(value interface{}) string {
+	if value == nil || (reflect.ValueOf(value).Kind() == reflect.Ptr && reflect.ValueOf(value).IsNil()) {
+		return ""
+	}
+	switch value.(type) {
+	case []byte:
+		return base64.URLEncoding.EncodeToString(value.([]byte))
+	case string:
+		return base64.URLEncoding.EncodeToString([]byte(value.(string)))
+	case error:
+		return base64.URLEncoding.EncodeToString([]byte(value.(error).Error()))
+	default:
+		marshal, err := json.Marshal(value)
+		if err != nil {
+			return ""
+		}
+		return base64.URLEncoding.EncodeToString(marshal)
+	}
+}
+
+// ToRawStdBase64 convert data to raw standard base64 encoding.
+func ToRawStdBase64(value interface{}) string {
+	if value == nil || (reflect.ValueOf(value).Kind() == reflect.Ptr && reflect.ValueOf(value).IsNil()) {
+		return ""
+	}
+	switch value.(type) {
+	case []byte:
+		return base64.RawStdEncoding.EncodeToString(value.([]byte))
+	case string:
+		return base64.RawStdEncoding.EncodeToString([]byte(value.(string)))
+	case error:
+		return base64.RawStdEncoding.EncodeToString([]byte(value.(error).Error()))
+	default:
+		marshal, err := json.Marshal(value)
+		if err != nil {
+			return ""
+		}
+		return base64.RawStdEncoding.EncodeToString(marshal)
+	}
+}
+
+// ToRawUrlBase64 convert data to raw URL base64 encoding.
+func ToRawUrlBase64(value interface{}) string {
+	if value == nil || (reflect.ValueOf(value).Kind() == reflect.Ptr && reflect.ValueOf(value).IsNil()) {
+		return ""
+	}
+	switch value.(type) {
+	case []byte:
+		return base64.RawURLEncoding.EncodeToString(value.([]byte))
+	case string:
+		return base64.RawURLEncoding.EncodeToString([]byte(value.(string)))
+	case error:
+		return base64.RawURLEncoding.EncodeToString([]byte(value.(error).Error()))
+	default:
+		marshal, err := json.Marshal(value)
+		if err != nil {
+			return ""
+		}
+		return base64.RawURLEncoding.EncodeToString(marshal)
+	}
+}
+
+// ToBigInt converts an integer of any supported type (int, int64, uint64, etc.) to *big.Int
+// Play: todo
+func ToBigInt(v interface{}) (*big.Int, error) {
+	result := new(big.Int)
+
+	switch v := (v).(type) {
+	case int:
+		result.SetInt64(int64(v))
+	case int8:
+		result.SetInt64(int64(v))
+	case int16:
+		result.SetInt64(int64(v))
+	case int32:
+		result.SetInt64(int64(v))
+	case int64:
+		result.SetInt64(v)
+	case uint:
+		result.SetUint64(uint64(v))
+	case uint8:
+		result.SetUint64(uint64(v))
+	case uint16:
+		result.SetUint64(uint64(v))
+	case uint32:
+		result.SetUint64(uint64(v))
+	case uint64:
+		result.SetUint64(v)
+	default:
+		return nil, fmt.Errorf("unsupported type: %T", v)
+	}
+
+	return result, nil
+}
--- a/convertor/convertor_internal.go
+++ b/convertor/convertor_internal.go
@@ -0,0 +1,298 @@
+// Copyright 2023 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package convertor implements some functions to convert data.
+package convertor
+
+import (
+	"fmt"
+	"reflect"
+)
+
+type cloner struct {
+	ptrs map[reflect.Type]map[uintptr]reflect.Value
+}
+
+// clone return a duplicate of passed item.
+func (c *cloner) clone(v reflect.Value) reflect.Value {
+	switch v.Kind() {
+	case reflect.Invalid:
+		return reflect.ValueOf(nil)
+
+	// bool
+	case reflect.Bool:
+		return reflect.ValueOf(v.Bool())
+
+	//int
+	case reflect.Int:
+		return reflect.ValueOf(int(v.Int()))
+	case reflect.Int8:
+		return reflect.ValueOf(int8(v.Int()))
+	case reflect.Int16:
+		return reflect.ValueOf(int16(v.Int()))
+	case reflect.Int32:
+		return reflect.ValueOf(int32(v.Int()))
+	case reflect.Int64:
+		return reflect.ValueOf(v.Int())
+
+	// uint
+	case reflect.Uint:
+		return reflect.ValueOf(uint(v.Uint()))
+	case reflect.Uint8:
+		return reflect.ValueOf(uint8(v.Uint()))
+	case reflect.Uint16:
+		return reflect.ValueOf(uint16(v.Uint()))
+	case reflect.Uint32:
+		return reflect.ValueOf(uint32(v.Uint()))
+	case reflect.Uint64:
+		return reflect.ValueOf(v.Uint())
+
+	// float
+	case reflect.Float32:
+		return reflect.ValueOf(float32(v.Float()))
+	case reflect.Float64:
+		return reflect.ValueOf(v.Float())
+
+	// complex
+	case reflect.Complex64:
+		return reflect.ValueOf(complex64(v.Complex()))
+	case reflect.Complex128:
+		return reflect.ValueOf(v.Complex())
+
+	// string
+	case reflect.String:
+		return reflect.ValueOf(v.String())
+
+	// array
+	case reflect.Array, reflect.Slice:
+		return c.cloneArray(v)
+
+	// map
+	case reflect.Map:
+		return c.cloneMap(v)
+
+	// Ptr
+	case reflect.Ptr:
+		return c.clonePtr(v)
+
+	// struct
+	case reflect.Struct:
+		return c.cloneStruct(v)
+
+	// func
+	case reflect.Func:
+		return v
+
+	// interface
+	case reflect.Interface:
+		return c.clone(v.Elem())
+
+	}
+
+	return reflect.Zero(v.Type())
+}
+
+func (c *cloner) cloneArray(v reflect.Value) reflect.Value {
+	if v.IsNil() {
+		return reflect.Zero(v.Type())
+	}
+
+	arr := reflect.MakeSlice(v.Type(), v.Len(), v.Len())
+
+	for i := 0; i < v.Len(); i++ {
+		val := c.clone(v.Index(i))
+
+		if val.IsValid() {
+			continue
+		}
+
+		item := arr.Index(i)
+		if !item.CanSet() {
+			continue
+		}
+
+		item.Set(val.Convert(item.Type()))
+	}
+
+	return arr
+}
+
+func (c *cloner) cloneMap(v reflect.Value) reflect.Value {
+	if v.IsNil() {
+		return reflect.Zero(v.Type())
+	}
+
+	clonedMap := reflect.MakeMap(v.Type())
+
+	for _, key := range v.MapKeys() {
+		value := v.MapIndex(key)
+		clonedKey := c.clone(key)
+		clonedValue := c.clone(value)
+
+		if !isNillable(clonedKey) || !clonedKey.IsNil() {
+			clonedKey = clonedKey.Convert(key.Type())
+		}
+
+		if (!isNillable(clonedValue) || !clonedValue.IsNil()) && clonedValue.IsValid() {
+			clonedValue = clonedValue.Convert(value.Type())
+		}
+
+		if !clonedValue.IsValid() {
+			clonedValue = reflect.Zero(clonedMap.Type().Elem())
+		}
+
+		clonedMap.SetMapIndex(clonedKey, clonedValue)
+	}
+
+	return clonedMap
+}
+
+func isNillable(v reflect.Value) bool {
+	switch v.Kind() {
+	case reflect.Chan, reflect.Interface, reflect.Ptr, reflect.Func:
+		return true
+	}
+	return false
+}
+
+func (c *cloner) clonePtr(v reflect.Value) reflect.Value {
+	if v.IsNil() {
+		return reflect.Zero(v.Type())
+	}
+
+	var newVal reflect.Value
+
+	if v.Elem().CanAddr() {
+		ptrs, exists := c.ptrs[v.Type()]
+		if exists {
+			if newVal, exists := ptrs[v.Elem().UnsafeAddr()]; exists {
+				return newVal
+			}
+		}
+	}
+
+	newVal = c.clone(v.Elem())
+
+	if v.Elem().CanAddr() {
+		ptrs, exists := c.ptrs[v.Type()]
+		if exists {
+			if newVal, exists := ptrs[v.Elem().UnsafeAddr()]; exists {
+				return newVal
+			}
+		}
+	}
+
+	clonedPtr := reflect.New(newVal.Type())
+	clonedPtr.Elem().Set(newVal)
+
+	return clonedPtr
+}
+
+func (c *cloner) cloneStruct(v reflect.Value) reflect.Value {
+	clonedStructPtr := reflect.New(v.Type())
+	clonedStruct := clonedStructPtr.Elem()
+
+	if v.CanAddr() {
+		ptrs := c.ptrs[clonedStructPtr.Type()]
+		if ptrs == nil {
+			ptrs = make(map[uintptr]reflect.Value)
+			c.ptrs[clonedStructPtr.Type()] = ptrs
+		}
+		ptrs[v.UnsafeAddr()] = clonedStructPtr
+	}
+
+	for i := 0; i < v.NumField(); i++ {
+		newStructValue := clonedStruct.Field(i)
+		if !newStructValue.CanSet() {
+			continue
+		}
+
+		clonedVal := c.clone(v.Field(i))
+		if !clonedVal.IsValid() {
+			continue
+		}
+
+		newStructValue.Set(clonedVal.Convert(newStructValue.Type()))
+	}
+
+	return clonedStruct
+}
+
+func setStructField(structObj interface{}, fieldName string, fieldValue interface{}) error {
+	structVal := reflect.ValueOf(structObj).Elem()
+
+	fName := getFieldNameByJsonTag(structObj, fieldName)
+	if fName == "" {
+		return fmt.Errorf("Struct field json tag don't match map key : %s in obj", fieldName)
+	}
+
+	fieldVal := structVal.FieldByName(fName)
+
+	if !fieldVal.IsValid() {
+		return fmt.Errorf("No such field: %s in obj", fieldName)
+	}
+
+	if !fieldVal.CanSet() {
+		return fmt.Errorf("Cannot set %s field value", fieldName)
+	}
+
+	val := reflect.ValueOf(fieldValue)
+
+	if fieldVal.Type() != val.Type() {
+
+		// fix: issue #275
+		if canConvert(fieldValue, fieldVal.Type()) {
+			fieldVal.Set(val.Convert(fieldVal.Type()))
+			return nil
+		}
+
+		if m, ok := fieldValue.(map[string]interface{}); ok {
+
+			if fieldVal.Kind() == reflect.Struct {
+				return MapToStruct(m, fieldVal.Addr().Interface())
+			}
+
+			if fieldVal.Kind() == reflect.Ptr && fieldVal.Type().Elem().Kind() == reflect.Struct {
+				if fieldVal.IsNil() {
+					fieldVal.Set(reflect.New(fieldVal.Type().Elem()))
+				}
+
+				return MapToStruct(m, fieldVal.Interface())
+			}
+
+		}
+
+		return fmt.Errorf("Map value type don't match struct field type")
+	}
+
+	fieldVal.Set(val)
+
+	return nil
+}
+
+func getFieldNameByJsonTag(structObj interface{}, jsonTag string) string {
+	s := reflect.TypeOf(structObj).Elem()
+
+	for i := 0; i < s.NumField(); i++ {
+		field := s.Field(i)
+		tag := field.Tag
+		name := tag.Get("json")
+
+		if name == jsonTag {
+			return field.Name
+		}
+	}
+
+	return ""
+}
+
+func canConvert(value interface{}, targetType reflect.Type) bool {
+	v := reflect.ValueOf(value)
+
+	defer func() {
+		if r := recover(); r != nil {
+		}
+	}()
+	v.Convert(targetType)
+	return true
+}
--- a/convertor/convertor_test.go
+++ b/convertor/convertor_test.go
@@ -1,10 +1,18 @@
 package convertor

 import (
+	"encoding/base64"
+	"errors"
 	"fmt"
+	"io"
+	"math/big"
+	"reflect"
 	"testing"
+	"unicode/utf8"
+	"unsafe"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
+	"github.com/duke-git/lancet/validator"
 )

 func TestToChar(t *testing.T) {
@@ -36,26 +44,33 @@ func TestToBool(t *testing.T) {
 func TestToBytes(t *testing.T) {
 	assert := internal.NewAssert(t, "TestToBytes")

-	cases := []any{
+	cases := []interface{}{
 		0,
 		false,
 		"1",
 	}
 	expected := [][]byte{
-		{3, 4, 0, 0},
-		{3, 2, 0, 0},
-		{4, 12, 0, 1, 49},
+		{0, 0, 0, 0, 0, 0, 0, 0},
+		{102, 97, 108, 115, 101},
+		{49},
 	}
 	for i := 0; i < len(cases); i++ {
 		actual, _ := ToBytes(cases[i])
 		assert.Equal(expected[i], actual)
 	}
+
+	bytesData, err := ToBytes("abc")
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+	assert.Equal("abc", ToString(bytesData))
 }

 func TestToInt(t *testing.T) {
 	assert := internal.NewAssert(t, "TestToInt")

-	cases := []any{"123", "-123", 123,
+	cases := []interface{}{"123", "-123", 123,
 		uint(123), uint8(123), uint16(123), uint32(123), uint64(123),
 		float32(12.3), float64(12.3),
 		"abc", false, "111111111111111111111111111111111111111"}
@@ -71,7 +86,7 @@ func TestToInt(t *testing.T) {
 func TestToFloat(t *testing.T) {
 	assert := internal.NewAssert(t, "TestToFloat")

-	cases := []any{
+	cases := []interface{}{
 		"", "-1", "-.11", "1.23e3", ".123e10", "abc",
 		int(0), int8(1), int16(-1), int32(123), int64(123),
 		uint(123), uint8(123), uint16(123), uint32(123), uint64(123),
@@ -99,7 +114,7 @@ func TestToString(t *testing.T) {
 	}
 	aStruct := TestStruct{Name: "TestStruct"}

-	cases := []any{
+	cases := []interface{}{
 		"", nil,
 		int(0), int8(1), int16(-1), int32(123), int64(123),
 		uint(123), uint8(123), uint16(123), uint32(123), uint64(123),
@@ -111,7 +126,7 @@ func TestToString(t *testing.T) {
 		"", "",
 		"0", "1", "-1",
 		"123", "123", "123", "123", "123", "123", "123",
-		"12.3", "12.300000190734863",
+		"12.3", "12.3",
 		"true", "false",
 		"[1,2,3]", "{\"a\":1,\"b\":2,\"c\":3}", "{\"Name\":\"TestStruct\"}", "hello"}

@@ -142,13 +157,17 @@ func TestStructToMap(t *testing.T) {
 		Name string `json:"name"`
 		age  int
 	}
-	p := People{
+	p := &People{
 		"test",
 		100,
 	}
 	pm, _ := StructToMap(p)
-	var expected = map[string]any{"name": "test"}
+	data, _ := StructToMap(p)
+	var expected = map[string]interface{}{
+		"name": "test",
+	}
 	assert.Equal(expected, pm)
+	assert.Equal(expected, data)
 }

 func TestColorHexToRGB(t *testing.T) {
@@ -171,3 +190,578 @@ func TestColorRGBToHex(t *testing.T) {
 	assert := internal.NewAssert(t, "TestColorRGBToHex")
 	assert.Equal(expected, colorHex)
 }
+
+func TestToChannel(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToChannel")
+
+	ch := ToChannel([]interface{}{1, 2, 3})
+	val1, _ := <-ch
+	assert.Equal(1, val1)
+
+	val2, _ := <-ch
+	assert.Equal(2, val2)
+
+	val3, _ := <-ch
+	assert.Equal(3, val3)
+
+	_, ok := <-ch
+	assert.Equal(false, ok)
+}
+
+func TestEncodeByte(t *testing.T) {
+	assert := internal.NewAssert(t, "TestEncodeByte")
+
+	byteData, _ := EncodeByte("abc")
+	expected := []byte{6, 12, 0, 3, 97, 98, 99}
+
+	assert.Equal(expected, byteData)
+}
+
+func TestDecodeByte(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDecodeByte")
+
+	var obj string
+	byteData := []byte{6, 12, 0, 3, 97, 98, 99}
+	DecodeByte(byteData, &obj)
+	assert.Equal("abc", obj)
+}
+
+func TestDeepClone(t *testing.T) {
+	// assert := internal.NewAssert(t, "TestDeepClone")
+
+	type Struct struct {
+		Str        string
+		Int        int
+		Float      float64
+		Bool       bool
+		Nil        interface{}
+		unexported string
+	}
+
+	cases := []interface{}{
+		true,
+		1,
+		0.1,
+		map[string]int{
+			"a": 1,
+			"b": 2,
+		},
+		&Struct{
+			Str:   "test",
+			Int:   1,
+			Float: 0.1,
+			Bool:  true,
+			Nil:   nil,
+			// unexported: "can't be cloned",
+		},
+	}
+
+	for i, item := range cases {
+		cloned := DeepClone(item)
+
+		t.Log(cloned)
+		if &cloned == &item {
+			t.Fatalf("[TestDeepClone case #%d failed]: equal pointer", i)
+		}
+
+		if !reflect.DeepEqual(item, cloned) {
+			t.Fatalf("[TestDeepClone case #%d failed] unequal objects", i)
+		}
+	}
+}
+
+func TestCopyProperties(t *testing.T) {
+	assert := internal.NewAssert(t, "TestCopyProperties")
+
+	type Disk struct {
+		Name    string  `json:"name"`
+		Total   string  `json:"total"`
+		Used    string  `json:"used"`
+		Percent float64 `json:"percent"`
+	}
+
+	type DiskVO struct {
+		Name    string  `json:"name"`
+		Total   string  `json:"total"`
+		Used    string  `json:"used"`
+		Percent float64 `json:"percent"`
+	}
+
+	type Indicator struct {
+		Id      string    `json:"id"`
+		Ip      string    `json:"ip"`
+		UpTime  string    `json:"upTime"`
+		LoadAvg string    `json:"loadAvg"`
+		Cpu     int       `json:"cpu"`
+		Disk    []Disk    `json:"disk"`
+		Stop    chan bool `json:"-"`
+	}
+
+	type IndicatorVO struct {
+		Id      string   `json:"id"`
+		Ip      string   `json:"ip"`
+		UpTime  string   `json:"upTime"`
+		LoadAvg string   `json:"loadAvg"`
+		Cpu     int64    `json:"cpu"`
+		Disk    []DiskVO `json:"disk"`
+	}
+
+	indicator := &Indicator{Id: "001", Ip: "127.0.0.1", Cpu: 1, Disk: []Disk{
+		{Name: "disk-001", Total: "100", Used: "1", Percent: 10},
+		{Name: "disk-002", Total: "200", Used: "1", Percent: 20},
+		{Name: "disk-003", Total: "300", Used: "1", Percent: 30},
+	}}
+
+	indicatorVO := IndicatorVO{}
+
+	err := CopyProperties(&indicatorVO, indicator)
+
+	assert.IsNil(err)
+	assert.Equal("001", indicatorVO.Id)
+	assert.Equal("127.0.0.1", indicatorVO.Ip)
+	assert.Equal(3, len(indicatorVO.Disk))
+}
+
+func TestToInterface(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToInterface")
+
+	cases := []reflect.Value{
+		reflect.ValueOf("abc"),
+		reflect.ValueOf(int(0)), reflect.ValueOf(int8(1)), reflect.ValueOf(int16(-1)), reflect.ValueOf(int32(123)), reflect.ValueOf(int64(123)),
+		reflect.ValueOf(uint(123)), reflect.ValueOf(uint8(123)), reflect.ValueOf(uint16(123)), reflect.ValueOf(uint32(123)), reflect.ValueOf(uint64(123)),
+		reflect.ValueOf(float64(12.3)), reflect.ValueOf(float32(12.3)),
+		reflect.ValueOf(true), reflect.ValueOf(false),
+	}
+
+	expected := []interface{}{
+		"abc",
+		0, int8(1), int16(-1), int32(123), int64(123),
+		uint(123), uint8(123), uint16(123), uint32(123), uint64(123),
+		float64(12.3), float32(12.3),
+		true, false,
+	}
+
+	for i := 0; i < len(cases); i++ {
+		actual, _ := ToInterface(cases[i])
+		assert.Equal(expected[i], actual)
+	}
+
+	nilVal, ok := ToInterface(reflect.ValueOf(nil))
+	assert.EqualValues(nil, nilVal)
+	assert.Equal(false, ok)
+}
+
+func TestUtf8ToGbk(t *testing.T) {
+	assert := internal.NewAssert(t, "TestUtf8ToGbk")
+
+	utf8Data := []byte("hello")
+	gbkData, err := Utf8ToGbk(utf8Data)
+
+	assert.Equal(true, utf8.Valid(utf8Data))
+	assert.Equal(true, validator.IsGBK(gbkData))
+	assert.IsNil(err)
+}
+
+func TestGbkToUtf8(t *testing.T) {
+	assert := internal.NewAssert(t, "TestGbkToUtf8")
+
+	gbkData, err := Utf8ToGbk([]byte("hello"))
+	utf8Data, err := GbkToUtf8(gbkData)
+
+	assert.IsNil(err)
+	assert.Equal(true, utf8.Valid(utf8Data))
+	assert.Equal("hello", string(utf8Data))
+}
+
+func TestMapToStruct(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestMapToStruct")
+
+	type Address struct {
+		Street string `json:"street"`
+		Number int    `json:"number"`
+	}
+
+	type Person struct {
+		Name  string   `json:"name"`
+		Age   int      `json:"age"`
+		Phone string   `json:"phone"`
+		Addr  *Address `json:"address"`
+	}
+
+	m := map[string]interface{}{
+		"name":  "Nothin",
+		"age":   28,
+		"phone": "123456789",
+		"address": map[string]interface{}{
+			"street": "test",
+			"number": 1,
+		},
+	}
+
+	var p Person
+	err := MapToStruct(m, &p)
+	assert.IsNil(err)
+	assert.Equal(m["name"], p.Name)
+	assert.Equal(m["age"], p.Age)
+	assert.Equal(m["phone"], p.Phone)
+	assert.Equal("test", p.Addr.Street)
+	assert.Equal(1, p.Addr.Number)
+}
+
+func TestToStdBase64(t *testing.T) {
+	t.Parallel()
+	assert := internal.NewAssert(t, "TestToStdBase64")
+
+	r1 := ToStdBase64("abc")
+	d1, _ := base64.StdEncoding.DecodeString(r1)
+	assert.Equal("abc", string(d1))
+
+	r2 := ToStdBase64([]byte("abc"))
+	d2, _ := base64.StdEncoding.DecodeString(r2)
+	assert.Equal("abc", string(d2))
+
+	r3 := ToStdBase64(123)
+	d3, _ := base64.StdEncoding.DecodeString(r3)
+	assert.Equal("123", string(d3))
+
+	r4 := ToStdBase64(11.11)
+	d4, _ := base64.StdEncoding.DecodeString(r4)
+	assert.Equal("11.11", string(d4))
+
+	r5 := ToStdBase64(map[string]interface{}{"name": "duke", "quantity": 1})
+	d5, _ := base64.StdEncoding.DecodeString(r5)
+	assert.Equal("{\"name\":\"duke\",\"quantity\":1}", string(d5))
+
+	r6 := ToStdBase64([]int64{7, 5, 9, 4, 23})
+	d6, _ := base64.StdEncoding.DecodeString(r6)
+	assert.Equal("[7,5,9,4,23]", string(d6))
+
+	r7 := ToStdBase64([]string{"7", "5", "9", "4", "23"})
+	d7, _ := base64.StdEncoding.DecodeString(r7)
+	assert.Equal("[\"7\",\"5\",\"9\",\"4\",\"23\"]", string(d7))
+
+	r8 := ToStdBase64(nil)
+	d8, _ := base64.StdEncoding.DecodeString(r8)
+	assert.Equal("", string(d8))
+
+	ch := make(chan int, 3)
+	ch <- 1
+	ch <- 2
+	r9 := ToStdBase64(ch)
+	d9, _ := base64.StdEncoding.DecodeString(r9)
+	assert.Equal("", string(d9))
+
+	r10 := ToStdBase64(io.EOF)
+	d10, _ := base64.StdEncoding.DecodeString(r10)
+	assert.Equal("EOF", string(d10))
+
+	r11 := ToStdBase64(errors.New("test"))
+	d11, _ := base64.StdEncoding.DecodeString(r11)
+	assert.Equal("test", string(d11))
+
+	typedNil := (*int)(nil)
+	r12 := ToStdBase64(typedNil)
+	d12, _ := base64.StdEncoding.DecodeString(r12)
+	assert.Equal("", string(d12))
+
+	type nilInterface interface {
+	}
+	var nI nilInterface = nil
+	d13, _ := base64.StdEncoding.DecodeString(ToStdBase64(nI))
+	assert.Equal("", string(d13))
+
+	var p unsafe.Pointer
+	d14, _ := base64.StdEncoding.DecodeString(ToStdBase64(p))
+	assert.Equal("", string(d14))
+}
+
+func TestToUrlBase64(t *testing.T) {
+	t.Parallel()
+	assert := internal.NewAssert(t, "TestToUrlBase64")
+
+	r1 := ToUrlBase64("abc")
+	d1, _ := base64.URLEncoding.DecodeString(r1)
+	assert.Equal("abc", string(d1))
+
+	r2 := ToUrlBase64([]byte("abc"))
+	d2, _ := base64.URLEncoding.DecodeString(r2)
+	assert.Equal("abc", string(d2))
+
+	r3 := ToUrlBase64(123)
+	d3, _ := base64.URLEncoding.DecodeString(r3)
+	assert.Equal("123", string(d3))
+
+	r4 := ToUrlBase64(11.11)
+	d4, _ := base64.URLEncoding.DecodeString(r4)
+	assert.Equal("11.11", string(d4))
+
+	r5 := ToUrlBase64(map[string]interface{}{"name": "duke", "quantity": 1})
+	d5, _ := base64.URLEncoding.DecodeString(r5)
+	assert.Equal("{\"name\":\"duke\",\"quantity\":1}", string(d5))
+
+	r6 := ToUrlBase64([]int64{7, 5, 9, 4, 23})
+	d6, _ := base64.URLEncoding.DecodeString(r6)
+	assert.Equal("[7,5,9,4,23]", string(d6))
+
+	r7 := ToUrlBase64([]string{"7", "5", "9", "4", "23"})
+	d7, _ := base64.URLEncoding.DecodeString(r7)
+	assert.Equal("[\"7\",\"5\",\"9\",\"4\",\"23\"]", string(d7))
+
+	r8 := ToUrlBase64(nil)
+	d8, _ := base64.URLEncoding.DecodeString(r8)
+	assert.Equal("", string(d8))
+
+	ch := make(chan int, 3)
+	ch <- 1
+	ch <- 2
+	r9 := ToUrlBase64(ch)
+	d9, _ := base64.URLEncoding.DecodeString(r9)
+	assert.Equal("", string(d9))
+
+	r10 := ToUrlBase64(io.EOF)
+	d10, _ := base64.URLEncoding.DecodeString(r10)
+	assert.Equal("EOF", string(d10))
+
+	r11 := ToUrlBase64(errors.New("test"))
+	d11, _ := base64.URLEncoding.DecodeString(r11)
+	assert.Equal("test", string(d11))
+
+	typedNil := (*int)(nil)
+	r12 := ToUrlBase64(typedNil)
+	d12, _ := base64.URLEncoding.DecodeString(r12)
+	assert.Equal("", string(d12))
+
+	type nilInterface interface {
+	}
+	var nI nilInterface = nil
+	d13, _ := base64.URLEncoding.DecodeString(ToUrlBase64(nI))
+	assert.Equal("", string(d13))
+
+	var p unsafe.Pointer
+	d14, _ := base64.URLEncoding.DecodeString(ToUrlBase64(p))
+	assert.Equal("", string(d14))
+
+	r15 := ToUrlBase64("4+3/4?=")
+	d15, _ := base64.URLEncoding.DecodeString(r15)
+	assert.Equal("4+3/4?=", string(d15))
+}
+
+func TestToRawStdBase64(t *testing.T) {
+	t.Parallel()
+	assert := internal.NewAssert(t, "TestToRawStdBase64")
+
+	r1 := ToRawStdBase64("abc")
+	d1, _ := base64.RawStdEncoding.DecodeString(r1)
+	assert.Equal("abc", string(d1))
+
+	r2 := ToRawStdBase64([]byte("abc"))
+	d2, _ := base64.RawStdEncoding.DecodeString(r2)
+	assert.Equal("abc", string(d2))
+
+	r3 := ToRawStdBase64(123)
+	d3, _ := base64.RawStdEncoding.DecodeString(r3)
+	assert.Equal("123", string(d3))
+
+	r4 := ToRawStdBase64(11.11)
+	d4, _ := base64.RawStdEncoding.DecodeString(r4)
+	assert.Equal("11.11", string(d4))
+
+	r5 := ToRawStdBase64(map[string]interface{}{"name": "duke", "quantity": 1})
+	d5, _ := base64.RawStdEncoding.DecodeString(r5)
+	assert.Equal("{\"name\":\"duke\",\"quantity\":1}", string(d5))
+
+	r6 := ToRawStdBase64([]int64{7, 5, 9, 4, 23})
+	d6, _ := base64.RawStdEncoding.DecodeString(r6)
+	assert.Equal("[7,5,9,4,23]", string(d6))
+
+	r7 := ToRawStdBase64([]string{"7", "5", "9", "4", "23"})
+	d7, _ := base64.RawStdEncoding.DecodeString(r7)
+	assert.Equal("[\"7\",\"5\",\"9\",\"4\",\"23\"]", string(d7))
+
+	r8 := ToRawStdBase64(nil)
+	d8, _ := base64.RawStdEncoding.DecodeString(r8)
+	assert.Equal("", string(d8))
+
+	ch := make(chan int, 3)
+	ch <- 1
+	ch <- 2
+	r9 := ToRawStdBase64(ch)
+	d9, _ := base64.RawStdEncoding.DecodeString(r9)
+	assert.Equal("", string(d9))
+
+	r10 := ToRawStdBase64(io.EOF)
+	d10, _ := base64.RawStdEncoding.DecodeString(r10)
+	assert.Equal("EOF", string(d10))
+
+	r11 := ToRawStdBase64(errors.New("test"))
+	d11, _ := base64.RawStdEncoding.DecodeString(r11)
+	assert.Equal("test", string(d11))
+
+	typedNil := (*int)(nil)
+	r12 := ToRawStdBase64(typedNil)
+	d12, _ := base64.RawStdEncoding.DecodeString(r12)
+	assert.Equal("", string(d12))
+
+	type nilInterface interface {
+	}
+	var nI nilInterface = nil
+	d13, _ := base64.RawStdEncoding.DecodeString(ToRawStdBase64(nI))
+	assert.Equal("", string(d13))
+
+	var p unsafe.Pointer
+	d14, _ := base64.RawStdEncoding.DecodeString(ToRawStdBase64(p))
+	assert.Equal("", string(d14))
+}
+
+func TestToRawUrlBase64(t *testing.T) {
+	t.Parallel()
+	assert := internal.NewAssert(t, "TestToRawUrlBase64")
+
+	r1 := ToRawUrlBase64("abc")
+	d1, _ := base64.RawURLEncoding.DecodeString(r1)
+	assert.Equal("abc", string(d1))
+
+	r2 := ToRawUrlBase64([]byte("abc"))
+	d2, _ := base64.RawURLEncoding.DecodeString(r2)
+	assert.Equal("abc", string(d2))
+
+	r3 := ToRawUrlBase64(123)
+	d3, _ := base64.RawURLEncoding.DecodeString(r3)
+	assert.Equal("123", string(d3))
+
+	r4 := ToRawUrlBase64(11.11)
+	d4, _ := base64.RawURLEncoding.DecodeString(r4)
+	assert.Equal("11.11", string(d4))
+
+	r5 := ToRawUrlBase64(map[string]interface{}{"name": "duke", "quantity": 1})
+	d5, _ := base64.RawURLEncoding.DecodeString(r5)
+	assert.Equal("{\"name\":\"duke\",\"quantity\":1}", string(d5))
+
+	r6 := ToRawUrlBase64([]int64{7, 5, 9, 4, 23})
+	d6, _ := base64.RawURLEncoding.DecodeString(r6)
+	assert.Equal("[7,5,9,4,23]", string(d6))
+
+	r7 := ToRawUrlBase64([]string{"7", "5", "9", "4", "23"})
+	d7, _ := base64.RawURLEncoding.DecodeString(r7)
+	assert.Equal("[\"7\",\"5\",\"9\",\"4\",\"23\"]", string(d7))
+
+	r8 := ToRawUrlBase64(nil)
+	d8, _ := base64.RawURLEncoding.DecodeString(r8)
+	assert.Equal("", string(d8))
+
+	ch := make(chan int, 3)
+	ch <- 1
+	ch <- 2
+	r9 := ToRawUrlBase64(ch)
+	d9, _ := base64.RawURLEncoding.DecodeString(r9)
+	assert.Equal("", string(d9))
+
+	r10 := ToRawUrlBase64(io.EOF)
+	d10, _ := base64.RawURLEncoding.DecodeString(r10)
+	assert.Equal("EOF", string(d10))
+
+	r11 := ToRawUrlBase64(errors.New("test"))
+	d11, _ := base64.RawURLEncoding.DecodeString(r11)
+	assert.Equal("test", string(d11))
+
+	typedNil := (*int)(nil)
+	r12 := ToRawUrlBase64(typedNil)
+	d12, _ := base64.RawURLEncoding.DecodeString(r12)
+	assert.Equal("", string(d12))
+
+	type nilInterface interface {
+	}
+	var nI nilInterface = nil
+	d13, _ := base64.RawURLEncoding.DecodeString(ToRawUrlBase64(nI))
+	assert.Equal("", string(d13))
+
+	var p unsafe.Pointer
+	d14, _ := base64.RawURLEncoding.DecodeString(ToRawUrlBase64(p))
+	assert.Equal("", string(d14))
+
+	r15 := ToRawUrlBase64("4+3/4?=")
+	d15, _ := base64.RawURLEncoding.DecodeString(r15)
+	assert.Equal("4+3/4?=", string(d15))
+}
+
+func TestToBigInt(t *testing.T) {
+	t.Parallel()
+	assert := internal.NewAssert(t, "TestToBigInt")
+
+	tests := []struct {
+		name   string
+		input  interface{}
+		want   *big.Int
+		hasErr bool
+	}{
+		{
+			name:  "int",
+			input: 42,
+			want:  big.NewInt(42),
+		},
+		{
+			name:  "int8",
+			input: int8(127),
+			want:  big.NewInt(127),
+		},
+		{
+			name:  "int16",
+			input: int16(32000),
+			want:  big.NewInt(32000),
+		},
+		{
+			name:  "int32",
+			input: int32(123456),
+			want:  big.NewInt(123456),
+		},
+		{
+			name:  "int64",
+			input: int64(987654321),
+			want:  big.NewInt(987654321),
+		},
+		{
+			name:  "uint",
+			input: uint(987654321),
+			want:  big.NewInt(987654321),
+		},
+		{
+			name:  "uint8",
+			input: uint8(255),
+			want:  big.NewInt(255),
+		},
+		{
+			name:  "uint16",
+			input: uint16(65535),
+			want:  big.NewInt(65535),
+		},
+		{
+			name:  "uint32",
+			input: uint32(4294967295),
+			want:  big.NewInt(4294967295),
+		},
+		{
+			name:  "uint64",
+			input: uint64(18446744073709551615),
+			want:  new(big.Int).SetUint64(18446744073709551615),
+		},
+		{
+			name:   "unsupported type",
+			input:  3.14, // Unsupported type
+			hasErr: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := ToBigInt(tt.input)
+			if (err != nil) != tt.hasErr {
+				t.Errorf("ToBigInt() error = %v, hasErr %v", err, tt.hasErr)
+				return
+			}
+
+			assert.Equal(tt.want, got)
+		})
+	}
+}
--- a/cryptor/aes.go
+++ b/cryptor/aes.go
@@ -1,168 +0,0 @@
-// Copyright 2021 dudaodong@gmail.com. All rights reserved.
-// Use of this source code is governed by MIT license
-
-// Package cryptor implements some util functions to encrypt and decrypt.
-// Note:
-// 1. for aes crypt function, the `key` param length should be 16, 24 or 32. if not, will panic.
-package cryptor
-
-import (
-	"bytes"
-	"crypto/aes"
-	"crypto/cipher"
-	"crypto/rand"
-	"io"
-)
-
-// AesEcbEncrypt encrypt data with key use AES ECB algorithm
-// len(key) should be 16, 24 or 32
-func AesEcbEncrypt(data, key []byte) []byte {
-	cipher, _ := aes.NewCipher(generateAesKey(key))
-	length := (len(data) + aes.BlockSize) / aes.BlockSize
-	plain := make([]byte, length*aes.BlockSize)
-	copy(plain, data)
-	pad := byte(len(plain) - len(data))
-	for i := len(data); i < len(plain); i++ {
-		plain[i] = pad
-	}
-	encrypted := make([]byte, len(plain))
-	for bs, be := 0, cipher.BlockSize(); bs <= len(data); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
-		cipher.Encrypt(encrypted[bs:be], plain[bs:be])
-	}
-
-	return encrypted
-}
-
-// AesEcbDecrypt decrypt data with key use AES ECB algorithm
-// len(key) should be 16, 24 or 32
-func AesEcbDecrypt(encrypted, key []byte) []byte {
-	cipher, _ := aes.NewCipher(generateAesKey(key))
-	decrypted := make([]byte, len(encrypted))
-	//
-	for bs, be := 0, cipher.BlockSize(); bs < len(encrypted); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
-		cipher.Decrypt(decrypted[bs:be], encrypted[bs:be])
-	}
-
-	trim := 0
-	if len(decrypted) > 0 {
-		trim = len(decrypted) - int(decrypted[len(decrypted)-1])
-	}
-
-	return decrypted[:trim]
-}
-
-// AesCbcEncrypt encrypt data with key use AES CBC algorithm
-// len(key) should be 16, 24 or 32
-func AesCbcEncrypt(data, key []byte) []byte {
-	// len(key) should be 16, 24 or 32
-	block, _ := aes.NewCipher(key)
-	blockSize := block.BlockSize()
-	data = pkcs7Padding(data, blockSize)
-	blockMode := cipher.NewCBCEncrypter(block, key[:blockSize])
-
-	encrypted := make([]byte, len(data))
-	blockMode.CryptBlocks(encrypted, data)
-	return encrypted
-}
-
-// AesCbcDecrypt decrypt data with key use AES CBC algorithm
-// len(key) should be 16, 24 or 32
-func AesCbcDecrypt(encrypted, key []byte) []byte {
-	block, _ := aes.NewCipher(key)
-	blockSize := block.BlockSize()
-	blockMode := cipher.NewCBCDecrypter(block, key[:blockSize])
-
-	decrypted := make([]byte, len(encrypted))
-	blockMode.CryptBlocks(decrypted, encrypted)
-	decrypted = pkcs7UnPadding(decrypted)
-	return decrypted
-}
-
-// AesCtrCrypt encrypt data with key use AES CTR algorithm
-// len(key) should be 16, 24 or 32
-func AesCtrCrypt(data, key []byte) []byte {
-	block, _ := aes.NewCipher(key)
-
-	iv := bytes.Repeat([]byte("1"), block.BlockSize())
-	stream := cipher.NewCTR(block, iv)
-
-	dst := make([]byte, len(data))
-	stream.XORKeyStream(dst, data)
-
-	return dst
-}
-
-// AesCfbEncrypt encrypt data with key use AES CFB algorithm
-// len(key) should be 16, 24 or 32
-func AesCfbEncrypt(data, key []byte) []byte {
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	encrypted := make([]byte, aes.BlockSize+len(data))
-	iv := encrypted[:aes.BlockSize]
-	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
-	}
-
-	stream := cipher.NewCFBEncrypter(block, iv)
-	stream.XORKeyStream(encrypted[aes.BlockSize:], data)
-	return encrypted
-}
-
-// AesCfbDecrypt decrypt data with key use AES CFB algorithm
-// len(encrypted) should be great than 16, len(key) should be 16, 24 or 32
-func AesCfbDecrypt(encrypted, key []byte) []byte {
-	block, _ := aes.NewCipher(key)
-	if len(encrypted) < aes.BlockSize {
-		panic("encrypted data is too short")
-	}
-	iv := encrypted[:aes.BlockSize]
-	encrypted = encrypted[aes.BlockSize:]
-
-	stream := cipher.NewCFBDecrypter(block, iv)
-	stream.XORKeyStream(encrypted, encrypted)
-	return encrypted
-}
-
-// AesOfbEncrypt encrypt data with key use AES OFB algorithm
-// len(key) should be 16, 24 or 32
-func AesOfbEncrypt(data, key []byte) []byte {
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-	data = pkcs7Padding(data, aes.BlockSize)
-	encrypted := make([]byte, aes.BlockSize+len(data))
-	iv := encrypted[:aes.BlockSize]
-	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
-	}
-
-	stream := cipher.NewOFB(block, iv)
-	stream.XORKeyStream(encrypted[aes.BlockSize:], data)
-	return encrypted
-}
-
-// AesOfbDecrypt decrypt data with key use AES OFB algorithm
-// len(key) should be 16, 24 or 32
-func AesOfbDecrypt(data, key []byte) []byte {
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	iv := data[:aes.BlockSize]
-	data = data[aes.BlockSize:]
-	if len(data)%aes.BlockSize != 0 {
-		return nil
-	}
-
-	decrypted := make([]byte, len(data))
-	mode := cipher.NewOFB(block, iv)
-	mode.XORKeyStream(decrypted, data)
-
-	decrypted = pkcs7UnPadding(decrypted)
-	return decrypted
-}
--- a/cryptor/aes_test.go
+++ b/cryptor/aes_test.go
@@ -1,62 +0,0 @@
-package cryptor
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-func TestAesEcbEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefghijklmnop"
-
-	aesEcbEncrypt := AesEcbEncrypt([]byte(data), []byte(key))
-	aesEcbDecrypt := AesEcbDecrypt(aesEcbEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestAesEcbEncrypt")
-	assert.Equal(data, string(aesEcbDecrypt))
-}
-
-func TestAesCbcEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefghijklmnop"
-
-	aesCbcEncrypt := AesCbcEncrypt([]byte(data), []byte(key))
-	aesCbcDecrypt := AesCbcDecrypt(aesCbcEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestAesCbcEncrypt")
-	assert.Equal(data, string(aesCbcDecrypt))
-}
-
-func TestAesCtrCrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefghijklmnop"
-
-	aesCtrCrypt := AesCtrCrypt([]byte(data), []byte(key))
-	aesCtrDeCrypt := AesCtrCrypt(aesCtrCrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestAesCtrCrypt")
-	assert.Equal(data, string(aesCtrDeCrypt))
-}
-
-func TestAesCfbEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefghijklmnop"
-
-	aesCfbEncrypt := AesCfbEncrypt([]byte(data), []byte(key))
-	aesCfbDecrypt := AesCfbDecrypt(aesCfbEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestAesCfbEncrypt")
-	assert.Equal(data, string(aesCfbDecrypt))
-}
-
-func TestAesOfbEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefghijklmnop"
-
-	aesOfbEncrypt := AesOfbEncrypt([]byte(data), []byte(key))
-	aesOfbDecrypt := AesOfbDecrypt(aesOfbEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestAesOfbEncrypt")
-	assert.Equal(data, string(aesOfbDecrypt))
-}
--- a/cryptor/basic.go
+++ b/cryptor/basic.go
@@ -37,6 +37,27 @@ func Md5String(s string) string {
 	return hex.EncodeToString(h.Sum(nil))
 }

+// Md5StringWithBase64 return the md5 value of string with base64.
+func Md5StringWithBase64(s string) string {
+	h := md5.New()
+	h.Write([]byte(s))
+	return base64.StdEncoding.EncodeToString(h.Sum(nil))
+}
+
+// Md5Byte return the md5 string of byte slice.
+func Md5Byte(data []byte) string {
+	h := md5.New()
+	h.Write(data)
+	return hex.EncodeToString(h.Sum(nil))
+}
+
+// Md5ByteWithBase64 return the md5 string of byte slice with base64.
+func Md5ByteWithBase64(data []byte) string {
+	h := md5.New()
+	h.Write(data)
+	return base64.StdEncoding.EncodeToString(h.Sum(nil))
+}
+
 // Md5File return the md5 value of file
 func Md5File(filename string) (string, error) {
 	if fileInfo, err := os.Stat(filename); err != nil {
@@ -76,6 +97,13 @@ func HmacMd5(data, key string) string {
 	return hex.EncodeToString(h.Sum([]byte("")))
 }

+// HmacMd5WithBase64 return the hmac hash of string use md5 with base64.
+func HmacMd5WithBase64(data, key string) string {
+	h := hmac.New(md5.New, []byte(key))
+	h.Write([]byte(data))
+	return base64.StdEncoding.EncodeToString(h.Sum([]byte("")))
+}
+
 // HmacSha1 return the hmac hash of string use sha1
 func HmacSha1(data, key string) string {
 	h := hmac.New(sha1.New, []byte(key))
@@ -83,6 +111,13 @@ func HmacSha1(data, key string) string {
 	return hex.EncodeToString(h.Sum([]byte("")))
 }

+// HmacSha1WithBase64 return the hmac hash of string use sha1 with base64.
+func HmacSha1WithBase64(str, key string) string {
+	h := hmac.New(sha1.New, []byte(key))
+	h.Write([]byte(str))
+	return base64.StdEncoding.EncodeToString(h.Sum([]byte("")))
+}
+
 // HmacSha256 return the hmac hash of string use sha256
 func HmacSha256(data, key string) string {
 	h := hmac.New(sha256.New, []byte(key))
@@ -90,6 +125,13 @@ func HmacSha256(data, key string) string {
 	return hex.EncodeToString(h.Sum([]byte("")))
 }

+// HmacSha256WithBase64 return the hmac hash of string use sha256 with base64.
+func HmacSha256WithBase64(str, key string) string {
+	h := hmac.New(sha256.New, []byte(key))
+	h.Write([]byte(str))
+	return base64.StdEncoding.EncodeToString(h.Sum([]byte("")))
+}
+
 // HmacSha512 return the hmac hash of string use sha512
 func HmacSha512(data, key string) string {
 	h := hmac.New(sha512.New, []byte(key))
@@ -97,6 +139,13 @@ func HmacSha512(data, key string) string {
 	return hex.EncodeToString(h.Sum([]byte("")))
 }

+// HmacSha512WithBase64 return the hmac hash of string use sha512 with base64.
+func HmacSha512WithBase64(str, key string) string {
+	h := hmac.New(sha512.New, []byte(key))
+	h.Write([]byte(str))
+	return base64.StdEncoding.EncodeToString(h.Sum([]byte("")))
+}
+
 // Sha1 return the sha1 value (SHA-1 hash algorithm) of string
 func Sha1(data string) string {
 	sha1 := sha1.New()
@@ -104,6 +153,13 @@ func Sha1(data string) string {
 	return hex.EncodeToString(sha1.Sum([]byte("")))
 }

+// Sha1WithBase64 return the sha1 value (SHA-1 hash algorithm) of base64 string.
+func Sha1WithBase64(str string) string {
+	sha1 := sha1.New()
+	sha1.Write([]byte(str))
+	return base64.StdEncoding.EncodeToString(sha1.Sum([]byte("")))
+}
+
 // Sha256 return the sha256 value (SHA256 hash algorithm) of string
 func Sha256(data string) string {
 	sha256 := sha256.New()
@@ -111,9 +167,23 @@ func Sha256(data string) string {
 	return hex.EncodeToString(sha256.Sum([]byte("")))
 }

+// Sha256WithBase64 return the sha256 value (SHA256 hash algorithm) of base64 string.
+func Sha256WithBase64(str string) string {
+	sha256 := sha256.New()
+	sha256.Write([]byte(str))
+	return base64.StdEncoding.EncodeToString(sha256.Sum([]byte("")))
+}
+
 // Sha512 return the sha512 value (SHA512 hash algorithm) of string
 func Sha512(data string) string {
 	sha512 := sha512.New()
 	sha512.Write([]byte(data))
 	return hex.EncodeToString(sha512.Sum([]byte("")))
 }
+
+// Sha512WithBase64 return the sha512 value (SHA512 hash algorithm) of base64 string.
+func Sha512WithBase64(str string) string {
+	sha512 := sha512.New()
+	sha512.Write([]byte(str))
+	return base64.StdEncoding.EncodeToString(sha512.Sum([]byte("")))
+}
--- a/cryptor/basic_test.go
+++ b/cryptor/basic_test.go
@@ -3,7 +3,7 @@ package cryptor
 import (
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestBase64StdEncode(t *testing.T) {
@@ -21,6 +21,22 @@ func TestMd5String(t *testing.T) {
 	assert.Equal("5d41402abc4b2a76b9719d911017c592", Md5String("hello"))
 }

+func TestMd5StringWithBase64(t *testing.T) {
+	assert := internal.NewAssert(t, "TestMd5StringWithBase64")
+	assert.Equal("XUFAKrxLKna5cZ2REBfFkg==", Md5StringWithBase64("hello"))
+}
+
+func TestMd5Byte(t *testing.T) {
+	assert := internal.NewAssert(t, "TestMd5Byte")
+	data := []byte{'a'}
+	assert.Equal("0cc175b9c0f1b6a831c399e269772661", Md5Byte(data))
+}
+
+func TestMd5ByteWithBase64(t *testing.T) {
+	assert := internal.NewAssert(t, "TestMd5ByteWithBase64")
+	assert.Equal("XUFAKrxLKna5cZ2REBfFkg==", Md5ByteWithBase64([]byte("hello")))
+}
+
 func TestMd5File(t *testing.T) {
 	fileMd5, err := Md5File("./basic.go")
 	assert := internal.NewAssert(t, "TestMd5File")
@@ -33,6 +49,11 @@ func TestHmacMd5(t *testing.T) {
 	assert.Equal("5f4c9faaff0a1ad3007d9ddc06abe36d", HmacMd5("hello world", "12345"))
 }

+func TestHmacMd5WithBase64(t *testing.T) {
+	assert := internal.NewAssert(t, "TestHmacMd5WithBase64")
+	assert.Equal("6DQwbquJLYclJdSRinpjmg==", HmacMd5WithBase64("hello", "12345"))
+}
+
 func TestHmacSha1(t *testing.T) {
 	s := "hello world"
 	key := "12345"
@@ -43,6 +64,16 @@ func TestHmacSha1(t *testing.T) {
 	assert.Equal(expected, hmacSha1)
 }

+func TestHmacSha1WithBase64(t *testing.T) {
+	s := "hello"
+	key := "12345"
+	hmacSha1 := HmacSha1WithBase64(s, key)
+	expected := "XGqdsMzLkuNu0DI/0Jt/k23prOA="
+
+	assert := internal.NewAssert(t, "TestHmacSha1")
+	assert.Equal(expected, hmacSha1)
+}
+
 func TestHmacSha256(t *testing.T) {
 	s := "hello world"
 	key := "12345"
@@ -53,6 +84,16 @@ func TestHmacSha256(t *testing.T) {
 	assert.Equal(expected, hmacSha256)
 }

+func TestHmacSha256WithBase64(t *testing.T) {
+	str := "hello"
+	key := "12345"
+	hms := HmacSha256WithBase64(str, key)
+	expected := "MVu5PE6YmGK6Ccti4F1zpfN2yzbw14btqwwyDQWf3nU="
+
+	assert := internal.NewAssert(t, "TestHmacSha256WithBase64")
+	assert.Equal(expected, hms)
+}
+
 func TestHmacSha512(t *testing.T) {
 	s := "hello world"
 	key := "12345"
@@ -63,6 +104,16 @@ func TestHmacSha512(t *testing.T) {
 	assert.Equal(expected, hmacSha512)
 }

+func TestHmacSha512WithBase64(t *testing.T) {
+	str := "hello"
+	key := "12345"
+	hms := HmacSha512WithBase64(str, key)
+	expected := "3Y8SkKndI9NU4lJtmi6c6M///dN8syCADRxsE9Lvw2Mog3ahlsVFja9T+OGqa0Wm2FYwPVwKIGS/+XhYYdSM/A=="
+
+	assert := internal.NewAssert(t, "TestHmacSha512WithBase64")
+	assert.Equal(expected, hms)
+}
+
 func TestSha1(t *testing.T) {
 	s := "hello world"
 	sha1 := Sha1(s)
@@ -72,6 +123,14 @@ func TestSha1(t *testing.T) {
 	assert.Equal(expected, sha1)
 }

+func TestSha1WithBase64(t *testing.T) {
+	str := Sha1WithBase64("hello")
+	expected := "qvTGHdzF6KLavt4PO0gs2a6pQ00="
+
+	assert := internal.NewAssert(t, "TestSha1WithBase64")
+	assert.Equal(expected, str)
+}
+
 func TestSha256(t *testing.T) {
 	s := "hello world"
 	sha256 := Sha256(s)
@@ -81,6 +140,14 @@ func TestSha256(t *testing.T) {
 	assert.Equal(expected, sha256)
 }

+func TestSha256WithBase64(t *testing.T) {
+	str := Sha256WithBase64("hello")
+	expected := "LPJNul+wow4m6DsqxbninhsWHlwfp0JecwQzYpOLmCQ="
+
+	assert := internal.NewAssert(t, "TestSha256WithBase64")
+	assert.Equal(expected, str)
+}
+
 func TestSha512(t *testing.T) {
 	s := "hello world"
 	sha512 := Sha512(s)
@@ -89,3 +156,11 @@ func TestSha512(t *testing.T) {
 	assert := internal.NewAssert(t, "TestSha512")
 	assert.Equal(expected, sha512)
 }
+
+func TestSha512WithBase64(t *testing.T) {
+	str := Sha512WithBase64("hello")
+	expected := "m3HSJL1i83hdltRq0+o9czGb+8KJDKra4t/3JRlnPKcjI8PZm6XBHXx6zG4UuMXaDEZjR1wuXDre9G9zvN7AQw=="
+
+	assert := internal.NewAssert(t, "TestSha512WithBase64")
+	assert.Equal(expected, str)
+}
--- a/cryptor/crypto.go
+++ b/cryptor/crypto.go
@@ -0,0 +1,490 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license
+
+// Package cryptor implements some util functions to encrypt and decrypt.
+// Note:
+// 1. for aes crypt function, the `key` param length should be 16, 24 or 32. if not, will panic.
+package cryptor
+
+import (
+	"bytes"
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/des"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/sha256"
+	"crypto/x509"
+	"encoding/pem"
+	"io"
+	"os"
+)
+
+// AesEcbEncrypt encrypt data with key use AES ECB algorithm
+// len(key) should be 16, 24 or 32
+func AesEcbEncrypt(data, key []byte) []byte {
+	size := len(key)
+	if size != 16 && size != 24 && size != 32 {
+		panic("key length shoud be 16 or 24 or 32")
+	}
+
+	cipher, _ := aes.NewCipher(generateAesKey(key, size))
+	length := (len(data) + aes.BlockSize) / aes.BlockSize
+
+	plain := make([]byte, length*aes.BlockSize)
+
+	copy(plain, data)
+
+	pad := byte(len(plain) - len(data))
+	for i := len(data); i < len(plain); i++ {
+		plain[i] = pad
+	}
+
+	encrypted := make([]byte, len(plain))
+	for bs, be := 0, cipher.BlockSize(); bs <= len(data); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
+		cipher.Encrypt(encrypted[bs:be], plain[bs:be])
+	}
+
+	return encrypted
+}
+
+// AesEcbDecrypt decrypt data with key use AES ECB algorithm
+// len(key) should be 16, 24 or 32
+func AesEcbDecrypt(encrypted, key []byte) []byte {
+	size := len(key)
+	if size != 16 && size != 24 && size != 32 {
+		panic("key length shoud be 16 or 24 or 32")
+	}
+
+	cipher, _ := aes.NewCipher(generateAesKey(key, size))
+	decrypted := make([]byte, len(encrypted))
+
+	for bs, be := 0, cipher.BlockSize(); bs < len(encrypted); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
+		cipher.Decrypt(decrypted[bs:be], encrypted[bs:be])
+	}
+
+	trim := 0
+	if len(decrypted) > 0 {
+		trim = len(decrypted) - int(decrypted[len(decrypted)-1])
+	}
+
+	return decrypted[:trim]
+}
+
+// AesCbcEncrypt encrypt data with key use AES CBC algorithm
+// len(key) should be 16, 24 or 32
+func AesCbcEncrypt(data, key []byte) []byte {
+	block, _ := aes.NewCipher(key)
+	data = pkcs7Padding(data, block.BlockSize())
+
+	encrypted := make([]byte, aes.BlockSize+len(data))
+	iv := encrypted[:aes.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		panic(err)
+	}
+
+	mode := cipher.NewCBCEncrypter(block, iv)
+	mode.CryptBlocks(encrypted[aes.BlockSize:], data)
+
+	return encrypted
+}
+
+// AesCbcDecrypt decrypt data with key use AES CBC algorithm
+// len(key) should be 16, 24 or 32
+func AesCbcDecrypt(encrypted, key []byte) []byte {
+	block, _ := aes.NewCipher(key)
+
+	iv := encrypted[:aes.BlockSize]
+	encrypted = encrypted[aes.BlockSize:]
+
+	mode := cipher.NewCBCDecrypter(block, iv)
+	mode.CryptBlocks(encrypted, encrypted)
+
+	decrypted := pkcs7UnPadding(encrypted)
+	return decrypted
+}
+
+// AesCtrCrypt encrypt data with key use AES CTR algorithm
+// len(key) should be 16, 24 or 32
+func AesCtrCrypt(data, key []byte) []byte {
+	block, _ := aes.NewCipher(key)
+
+	iv := bytes.Repeat([]byte("1"), block.BlockSize())
+	stream := cipher.NewCTR(block, iv)
+
+	dst := make([]byte, len(data))
+	stream.XORKeyStream(dst, data)
+
+	return dst
+}
+
+// AesCfbEncrypt encrypt data with key use AES CFB algorithm
+// len(key) should be 16, 24 or 32
+func AesCfbEncrypt(data, key []byte) []byte {
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		panic(err)
+	}
+
+	encrypted := make([]byte, aes.BlockSize+len(data))
+	iv := encrypted[:aes.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		panic(err)
+	}
+
+	stream := cipher.NewCFBEncrypter(block, iv)
+	stream.XORKeyStream(encrypted[aes.BlockSize:], data)
+	return encrypted
+}
+
+// AesCfbDecrypt decrypt data with key use AES CFB algorithm
+// len(encrypted) should be great than 16, len(key) should be 16, 24 or 32
+func AesCfbDecrypt(encrypted, key []byte) []byte {
+	block, _ := aes.NewCipher(key)
+	if len(encrypted) < aes.BlockSize {
+		panic("encrypted data is too short")
+	}
+	iv := encrypted[:aes.BlockSize]
+	encrypted = encrypted[aes.BlockSize:]
+
+	stream := cipher.NewCFBDecrypter(block, iv)
+	stream.XORKeyStream(encrypted, encrypted)
+	return encrypted
+}
+
+// AesOfbEncrypt encrypt data with key use AES OFB algorithm
+// len(key) should be 16, 24 or 32
+func AesOfbEncrypt(data, key []byte) []byte {
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		panic(err)
+	}
+	data = pkcs7Padding(data, aes.BlockSize)
+	encrypted := make([]byte, aes.BlockSize+len(data))
+	iv := encrypted[:aes.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		panic(err)
+	}
+
+	stream := cipher.NewOFB(block, iv)
+	stream.XORKeyStream(encrypted[aes.BlockSize:], data)
+	return encrypted
+}
+
+// AesOfbDecrypt decrypt data with key use AES OFB algorithm
+// len(key) should be 16, 24 or 32
+func AesOfbDecrypt(data, key []byte) []byte {
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		panic(err)
+	}
+
+	iv := data[:aes.BlockSize]
+	data = data[aes.BlockSize:]
+	if len(data)%aes.BlockSize != 0 {
+		return nil
+	}
+
+	decrypted := make([]byte, len(data))
+	mode := cipher.NewOFB(block, iv)
+	mode.XORKeyStream(decrypted, data)
+
+	decrypted = pkcs7UnPadding(decrypted)
+	return decrypted
+}
+
+// DesEcbEncrypt encrypt data with key use DES ECB algorithm
+// len(key) should be 8
+func DesEcbEncrypt(data, key []byte) []byte {
+	cipher, _ := des.NewCipher(generateDesKey(key))
+	length := (len(data) + des.BlockSize) / des.BlockSize
+	plain := make([]byte, length*des.BlockSize)
+	copy(plain, data)
+
+	pad := byte(len(plain) - len(data))
+	for i := len(data); i < len(plain); i++ {
+		plain[i] = pad
+	}
+
+	encrypted := make([]byte, len(plain))
+	for bs, be := 0, cipher.BlockSize(); bs <= len(data); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
+		cipher.Encrypt(encrypted[bs:be], plain[bs:be])
+	}
+
+	return encrypted
+}
+
+// DesEcbDecrypt decrypt data with key use DES ECB algorithm
+// len(key) should be 8
+func DesEcbDecrypt(encrypted, key []byte) []byte {
+	cipher, _ := des.NewCipher(generateDesKey(key))
+	decrypted := make([]byte, len(encrypted))
+
+	for bs, be := 0, cipher.BlockSize(); bs < len(encrypted); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
+		cipher.Decrypt(decrypted[bs:be], encrypted[bs:be])
+	}
+
+	trim := 0
+	if len(decrypted) > 0 {
+		trim = len(decrypted) - int(decrypted[len(decrypted)-1])
+	}
+
+	return decrypted[:trim]
+}
+
+// DesCbcEncrypt encrypt data with key use DES CBC algorithm
+// len(key) should be 8
+func DesCbcEncrypt(data, key []byte) []byte {
+	block, _ := des.NewCipher(key)
+	data = pkcs7Padding(data, block.BlockSize())
+
+	encrypted := make([]byte, des.BlockSize+len(data))
+	iv := encrypted[:des.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		panic(err)
+	}
+
+	mode := cipher.NewCBCEncrypter(block, iv)
+	mode.CryptBlocks(encrypted[des.BlockSize:], data)
+
+	return encrypted
+}
+
+// DesCbcDecrypt decrypt data with key use DES CBC algorithm
+// len(key) should be 8
+func DesCbcDecrypt(encrypted, key []byte) []byte {
+	block, _ := des.NewCipher(key)
+
+	iv := encrypted[:des.BlockSize]
+	encrypted = encrypted[des.BlockSize:]
+
+	mode := cipher.NewCBCDecrypter(block, iv)
+	mode.CryptBlocks(encrypted, encrypted)
+
+	decrypted := pkcs7UnPadding(encrypted)
+	return decrypted
+}
+
+// DesCtrCrypt encrypt data with key use DES CTR algorithm
+// len(key) should be 8
+func DesCtrCrypt(data, key []byte) []byte {
+	block, _ := des.NewCipher(key)
+
+	iv := bytes.Repeat([]byte("1"), block.BlockSize())
+	stream := cipher.NewCTR(block, iv)
+
+	dst := make([]byte, len(data))
+	stream.XORKeyStream(dst, data)
+
+	return dst
+}
+
+// DesCfbEncrypt encrypt data with key use DES CFB algorithm
+// len(key) should be 8
+func DesCfbEncrypt(data, key []byte) []byte {
+	block, err := des.NewCipher(key)
+	if err != nil {
+		panic(err)
+	}
+
+	encrypted := make([]byte, des.BlockSize+len(data))
+	iv := encrypted[:des.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		panic(err)
+	}
+
+	stream := cipher.NewCFBEncrypter(block, iv)
+	stream.XORKeyStream(encrypted[des.BlockSize:], data)
+
+	return encrypted
+}
+
+// DesCfbDecrypt decrypt data with key use DES CFB algorithm
+// len(encrypted) should be great than 16, len(key) should be 8
+func DesCfbDecrypt(encrypted, key []byte) []byte {
+	block, _ := des.NewCipher(key)
+	if len(encrypted) < des.BlockSize {
+		panic("encrypted data is too short")
+	}
+	iv := encrypted[:des.BlockSize]
+	encrypted = encrypted[des.BlockSize:]
+
+	stream := cipher.NewCFBDecrypter(block, iv)
+	stream.XORKeyStream(encrypted, encrypted)
+
+	return encrypted
+}
+
+// DesOfbEncrypt encrypt data with key use DES OFB algorithm
+// len(key) should be 16, 24 or 32
+func DesOfbEncrypt(data, key []byte) []byte {
+	block, err := des.NewCipher(key)
+	if err != nil {
+		panic(err)
+	}
+	data = pkcs7Padding(data, des.BlockSize)
+	encrypted := make([]byte, des.BlockSize+len(data))
+	iv := encrypted[:des.BlockSize]
+	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
+		panic(err)
+	}
+
+	stream := cipher.NewOFB(block, iv)
+	stream.XORKeyStream(encrypted[des.BlockSize:], data)
+
+	return encrypted
+}
+
+// DesOfbDecrypt decrypt data with key use DES OFB algorithm
+// len(key) should be 8
+func DesOfbDecrypt(data, key []byte) []byte {
+	block, err := des.NewCipher(key)
+	if err != nil {
+		panic(err)
+	}
+
+	iv := data[:des.BlockSize]
+	data = data[des.BlockSize:]
+	if len(data)%des.BlockSize != 0 {
+		return nil
+	}
+
+	decrypted := make([]byte, len(data))
+	mode := cipher.NewOFB(block, iv)
+	mode.XORKeyStream(decrypted, data)
+
+	decrypted = pkcs7UnPadding(decrypted)
+
+	return decrypted
+}
+
+// GenerateRsaKey make  a rsa private key, and return key file name
+// Generated key file is `rsa_private.pem` and `rsa_public.pem` in current path
+func GenerateRsaKey(keySize int, priKeyFile, pubKeyFile string) error {
+	// private key
+	privateKey, err := rsa.GenerateKey(rand.Reader, keySize)
+	if err != nil {
+		return err
+	}
+
+	derText := x509.MarshalPKCS1PrivateKey(privateKey)
+
+	block := pem.Block{
+		Type:  "rsa private key",
+		Bytes: derText,
+	}
+
+	//file,err := os.Create("rsa_private.pem")
+	file, err := os.Create(priKeyFile)
+	if err != nil {
+		panic(err)
+	}
+	pem.Encode(file, &block)
+	file.Close()
+
+	// public key
+	publicKey := privateKey.PublicKey
+
+	derpText, err := x509.MarshalPKIXPublicKey(&publicKey)
+	if err != nil {
+		return err
+	}
+
+	block = pem.Block{
+		Type:  "rsa public key",
+		Bytes: derpText,
+	}
+
+	//file,err = os.Create("rsa_public.pem")
+	file, err = os.Create(pubKeyFile)
+	if err != nil {
+		return err
+	}
+	pem.Encode(file, &block)
+	file.Close()
+
+	return nil
+}
+
+// RsaEncrypt encrypt data with ras algorithm
+func RsaEncrypt(data []byte, pubKeyFileName string) []byte {
+	file, err := os.Open(pubKeyFileName)
+	if err != nil {
+		panic(err)
+	}
+	fileInfo, err := file.Stat()
+	if err != nil {
+		panic(err)
+	}
+	defer file.Close()
+	buf := make([]byte, fileInfo.Size())
+	file.Read(buf)
+
+	block, _ := pem.Decode(buf)
+
+	pubInterface, err := x509.ParsePKIXPublicKey(block.Bytes)
+	if err != nil {
+		panic(err)
+	}
+	pubKey := pubInterface.(*rsa.PublicKey)
+
+	cipherText, err := rsa.EncryptPKCS1v15(rand.Reader, pubKey, data)
+	if err != nil {
+		panic(err)
+	}
+	return cipherText
+}
+
+// RsaDecrypt decrypt data with ras algorithm
+func RsaDecrypt(data []byte, privateKeyFileName string) []byte {
+	file, err := os.Open(privateKeyFileName)
+	if err != nil {
+		panic(err)
+	}
+	fileInfo, err := file.Stat()
+	if err != nil {
+		panic(err)
+	}
+	buf := make([]byte, fileInfo.Size())
+	defer file.Close()
+	file.Read(buf)
+
+	block, _ := pem.Decode(buf)
+
+	priKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
+	if err != nil {
+		panic(err)
+	}
+
+	plainText, err := rsa.DecryptPKCS1v15(rand.Reader, priKey, data)
+	if err != nil {
+		panic(err)
+	}
+	return plainText
+}
+
+// GenerateRsaKeyPair create rsa private and public key.
+func GenerateRsaKeyPair(keySize int) (*rsa.PrivateKey, *rsa.PublicKey) {
+	privateKey, _ := rsa.GenerateKey(rand.Reader, keySize)
+	return privateKey, &privateKey.PublicKey
+}
+
+// RsaEncryptOAEP encrypts the given data with RSA-OAEP.
+func RsaEncryptOAEP(data []byte, label []byte, key rsa.PublicKey) ([]byte, error) {
+	encryptedBytes, err := rsa.EncryptOAEP(sha256.New(), rand.Reader, &key, data, label)
+	if err != nil {
+		return nil, err
+	}
+
+	return encryptedBytes, nil
+}
+
+// RsaDecryptOAEP decrypts the data with RSA-OAEP.
+func RsaDecryptOAEP(ciphertext []byte, label []byte, key rsa.PrivateKey) ([]byte, error) {
+	decryptedBytes, err := rsa.DecryptOAEP(sha256.New(), rand.Reader, &key, ciphertext, label)
+	if err != nil {
+		return nil, err
+	}
+
+	return decryptedBytes, nil
+}
--- a/cryptor/crypto_internal.go
+++ b/cryptor/crypto_internal.go
@@ -2,15 +2,15 @@ package cryptor

 import "bytes"

-func generateAesKey(key []byte) []byte {
-	genKey := make([]byte, 16)
-	copy(genKey, key)
-	for i := 16; i < len(key); {
-		for j := 0; j < 16 && i < len(key); j, i = j+1, i+1 {
-			genKey[j] ^= key[i]
+func generateAesKey(key []byte, size int) []byte {
+	aesKey := make([]byte, size)
+	copy(aesKey, key)
+	for i := size; i < len(key); {
+		for j := 0; j < size && i < len(key); j, i = j+1, i+1 {
+			aesKey[j] ^= key[i]
 		}
 	}
-	return genKey
+	return aesKey
 }

 func generateDesKey(key []byte) []byte {
--- a/cryptor/crypto_test.go
+++ b/cryptor/crypto_test.go
@@ -0,0 +1,148 @@
+package cryptor
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/internal"
+)
+
+func TestAesEcbEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefghijklmnop"
+
+	aesEcbEncrypt := AesEcbEncrypt([]byte(data), []byte(key))
+	aesEcbDecrypt := AesEcbDecrypt(aesEcbEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestAesEcbEncrypt")
+	assert.Equal(data, string(aesEcbDecrypt))
+}
+
+func TestAesCbcEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefghijklmnop"
+
+	aesCbcEncrypt := AesCbcEncrypt([]byte(data), []byte(key))
+	aesCbcDecrypt := AesCbcDecrypt(aesCbcEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestAesCbcEncrypt")
+	assert.Equal(data, string(aesCbcDecrypt))
+}
+
+func TestAesCtrCrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefghijklmnop"
+
+	aesCtrCrypt := AesCtrCrypt([]byte(data), []byte(key))
+	aesCtrDeCrypt := AesCtrCrypt(aesCtrCrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestAesCtrCrypt")
+	assert.Equal(data, string(aesCtrDeCrypt))
+}
+
+func TestAesCfbEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefghijklmnop"
+
+	aesCfbEncrypt := AesCfbEncrypt([]byte(data), []byte(key))
+	aesCfbDecrypt := AesCfbDecrypt(aesCfbEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestAesCfbEncrypt")
+	assert.Equal(data, string(aesCfbDecrypt))
+}
+
+func TestAesOfbEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefghijklmnop"
+
+	aesOfbEncrypt := AesOfbEncrypt([]byte(data), []byte(key))
+	aesOfbDecrypt := AesOfbDecrypt(aesOfbEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestAesOfbEncrypt")
+	assert.Equal(data, string(aesOfbDecrypt))
+}
+
+func TestDesEcbEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefgh"
+
+	desEcbEncrypt := DesEcbEncrypt([]byte(data), []byte(key))
+	desEcbDecrypt := DesEcbDecrypt(desEcbEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestDesEcbEncrypt")
+	assert.Equal(data, string(desEcbDecrypt))
+}
+
+func TestDesCbcEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefgh"
+
+	desCbcEncrypt := DesCbcEncrypt([]byte(data), []byte(key))
+	desCbcDecrypt := DesCbcDecrypt(desCbcEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestDesCbcEncrypt")
+	assert.Equal(data, string(desCbcDecrypt))
+}
+
+func TestDesCtrCrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefgh"
+
+	desCtrCrypt := DesCtrCrypt([]byte(data), []byte(key))
+	desCtrDeCrypt := DesCtrCrypt(desCtrCrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestDesCtrCrypt")
+	assert.Equal(data, string(desCtrDeCrypt))
+}
+
+func TestDesCfbEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefgh"
+
+	desCfbEncrypt := DesCfbEncrypt([]byte(data), []byte(key))
+	desCfbDecrypt := DesCfbDecrypt(desCfbEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestDesCfbEncrypt")
+	assert.Equal(data, string(desCfbDecrypt))
+}
+
+func TestDesOfbEncrypt(t *testing.T) {
+	data := "hello world"
+	key := "abcdefgh"
+
+	desOfbEncrypt := DesOfbEncrypt([]byte(data), []byte(key))
+	desOfbDecrypt := DesOfbDecrypt(desOfbEncrypt, []byte(key))
+
+	assert := internal.NewAssert(t, "TestDesOfbEncrypt")
+	assert.Equal(data, string(desOfbDecrypt))
+}
+
+func TestRsaEncrypt(t *testing.T) {
+	err := GenerateRsaKey(4096, "rsa_private.pem", "rsa_public.pem")
+	if err != nil {
+		t.FailNow()
+	}
+	data := []byte("hello world")
+	encrypted := RsaEncrypt(data, "rsa_public.pem")
+	decrypted := RsaDecrypt(encrypted, "rsa_private.pem")
+
+	assert := internal.NewAssert(t, "TestRsaEncrypt")
+	assert.Equal(string(data), string(decrypted))
+}
+
+func TestRsaEncryptOAEP(t *testing.T) {
+	assert := internal.NewAssert(t, "TestRsaEncrypt")
+	t.Parallel()
+
+	pri, pub := GenerateRsaKeyPair(1024)
+
+	data := []byte("hello world")
+	label := []byte("123456")
+
+	encrypted, err := RsaEncryptOAEP(data, label, *pub)
+	assert.IsNil(err)
+
+	decrypted, err := RsaDecryptOAEP([]byte(encrypted), label, *pri)
+
+	assert.IsNil(err)
+	assert.Equal("hello world", string(decrypted))
+}
--- a/cryptor/des.go
+++ b/cryptor/des.go
@@ -1,173 +0,0 @@
-// Copyright 2021 dudaodong@gmail.com. All rights reserved.
-// Use of this source code is governed by MIT license
-
-// Package cryptor implements some util functions to encrypt and decrypt.
-package cryptor
-
-import (
-	"bytes"
-	"crypto/cipher"
-	"crypto/des"
-	"crypto/rand"
-	"io"
-)
-
-// DesEcbEncrypt encrypt data with key use DES ECB algorithm
-// len(key) should be 8
-func DesEcbEncrypt(data, key []byte) []byte {
-	cipher, _ := des.NewCipher(generateDesKey(key))
-	length := (len(data) + des.BlockSize) / des.BlockSize
-	plain := make([]byte, length*des.BlockSize)
-	copy(plain, data)
-
-	pad := byte(len(plain) - len(data))
-	for i := len(data); i < len(plain); i++ {
-		plain[i] = pad
-	}
-
-	encrypted := make([]byte, len(plain))
-	for bs, be := 0, cipher.BlockSize(); bs <= len(data); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
-		cipher.Encrypt(encrypted[bs:be], plain[bs:be])
-	}
-
-	return encrypted
-}
-
-// DesEcbDecrypt decrypt data with key use DES ECB algorithm
-// len(key) should be 8
-func DesEcbDecrypt(encrypted, key []byte) []byte {
-	cipher, _ := des.NewCipher(generateDesKey(key))
-	decrypted := make([]byte, len(encrypted))
-
-	for bs, be := 0, cipher.BlockSize(); bs < len(encrypted); bs, be = bs+cipher.BlockSize(), be+cipher.BlockSize() {
-		cipher.Decrypt(decrypted[bs:be], encrypted[bs:be])
-	}
-
-	trim := 0
-	if len(decrypted) > 0 {
-		trim = len(decrypted) - int(decrypted[len(decrypted)-1])
-	}
-
-	return decrypted[:trim]
-}
-
-// DesCbcEncrypt encrypt data with key use DES CBC algorithm
-// len(key) should be 8
-func DesCbcEncrypt(data, key []byte) []byte {
-	block, _ := des.NewCipher(key)
-	blockSize := block.BlockSize()
-	data = pkcs7Padding(data, blockSize)
-	blockMode := cipher.NewCBCEncrypter(block, key[:blockSize])
-
-	encrypted := make([]byte, len(data))
-	blockMode.CryptBlocks(encrypted, data)
-
-	return encrypted
-}
-
-// DesCbcDecrypt decrypt data with key use DES CBC algorithm
-// len(key) should be 8
-func DesCbcDecrypt(encrypted, key []byte) []byte {
-	block, _ := des.NewCipher(key)
-	blockSize := block.BlockSize()
-	blockMode := cipher.NewCBCDecrypter(block, key[:blockSize])
-
-	decrypted := make([]byte, len(encrypted))
-	blockMode.CryptBlocks(decrypted, encrypted)
-	decrypted = pkcs7UnPadding(decrypted)
-
-	return decrypted
-}
-
-// DesCtrCrypt encrypt data with key use DES CTR algorithm
-// len(key) should be 8
-func DesCtrCrypt(data, key []byte) []byte {
-	block, _ := des.NewCipher(key)
-
-	iv := bytes.Repeat([]byte("1"), block.BlockSize())
-	stream := cipher.NewCTR(block, iv)
-
-	dst := make([]byte, len(data))
-	stream.XORKeyStream(dst, data)
-
-	return dst
-}
-
-// DesCfbEncrypt encrypt data with key use DES CFB algorithm
-// len(key) should be 8
-func DesCfbEncrypt(data, key []byte) []byte {
-	block, err := des.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	encrypted := make([]byte, des.BlockSize+len(data))
-	iv := encrypted[:des.BlockSize]
-	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
-	}
-
-	stream := cipher.NewCFBEncrypter(block, iv)
-	stream.XORKeyStream(encrypted[des.BlockSize:], data)
-
-	return encrypted
-}
-
-// DesCfbDecrypt decrypt data with key use DES CFB algorithm
-// len(encrypted) should be great than 16, len(key) should be 8
-func DesCfbDecrypt(encrypted, key []byte) []byte {
-	block, _ := des.NewCipher(key)
-	if len(encrypted) < des.BlockSize {
-		panic("encrypted data is too short")
-	}
-	iv := encrypted[:des.BlockSize]
-	encrypted = encrypted[des.BlockSize:]
-
-	stream := cipher.NewCFBDecrypter(block, iv)
-	stream.XORKeyStream(encrypted, encrypted)
-
-	return encrypted
-}
-
-// DesOfbEncrypt encrypt data with key use DES OFB algorithm
-// len(key) should be 16, 24 or 32
-func DesOfbEncrypt(data, key []byte) []byte {
-	block, err := des.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-	data = pkcs7Padding(data, des.BlockSize)
-	encrypted := make([]byte, des.BlockSize+len(data))
-	iv := encrypted[:des.BlockSize]
-	if _, err := io.ReadFull(rand.Reader, iv); err != nil {
-		panic(err)
-	}
-
-	stream := cipher.NewOFB(block, iv)
-	stream.XORKeyStream(encrypted[des.BlockSize:], data)
-
-	return encrypted
-}
-
-// DesOfbDecrypt decrypt data with key use DES OFB algorithm
-// len(key) should be 8
-func DesOfbDecrypt(data, key []byte) []byte {
-	block, err := des.NewCipher(key)
-	if err != nil {
-		panic(err)
-	}
-
-	iv := data[:des.BlockSize]
-	data = data[des.BlockSize:]
-	if len(data)%des.BlockSize != 0 {
-		return nil
-	}
-
-	decrypted := make([]byte, len(data))
-	mode := cipher.NewOFB(block, iv)
-	mode.XORKeyStream(decrypted, data)
-
-	decrypted = pkcs7UnPadding(decrypted)
-
-	return decrypted
-}
--- a/cryptor/des_test.go
+++ b/cryptor/des_test.go
@@ -1,62 +0,0 @@
-package cryptor
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-func TestDesEcbEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefgh"
-
-	desEcbEncrypt := DesEcbEncrypt([]byte(data), []byte(key))
-	desEcbDecrypt := DesEcbDecrypt(desEcbEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestDesEcbEncrypt")
-	assert.Equal(data, string(desEcbDecrypt))
-}
-
-func TestDesCbcEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefgh"
-
-	desCbcEncrypt := DesCbcEncrypt([]byte(data), []byte(key))
-	desCbcDecrypt := DesCbcDecrypt(desCbcEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestDesCbcEncrypt")
-	assert.Equal(data, string(desCbcDecrypt))
-}
-
-func TestDesCtrCrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefgh"
-
-	desCtrCrypt := DesCtrCrypt([]byte(data), []byte(key))
-	desCtrDeCrypt := DesCtrCrypt(desCtrCrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestDesCtrCrypt")
-	assert.Equal(data, string(desCtrDeCrypt))
-}
-
-func TestDesCfbEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefgh"
-
-	desCfbEncrypt := DesCfbEncrypt([]byte(data), []byte(key))
-	desCfbDecrypt := DesCfbDecrypt(desCfbEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestDesCfbEncrypt")
-	assert.Equal(data, string(desCfbDecrypt))
-}
-
-func TestDesOfbEncrypt(t *testing.T) {
-	data := "hello world"
-	key := "abcdefgh"
-
-	desOfbEncrypt := DesOfbEncrypt([]byte(data), []byte(key))
-	desOfbDecrypt := DesOfbDecrypt(desOfbEncrypt, []byte(key))
-
-	assert := internal.NewAssert(t, "TestDesOfbEncrypt")
-	assert.Equal(data, string(desOfbDecrypt))
-}
--- a/cryptor/rsa.go
+++ b/cryptor/rsa.go
@@ -1,118 +0,0 @@
-// Copyright 2021 dudaodong@gmail.com. All rights reserved.
-// Use of this source code is governed by MIT license
-
-// Package cryptor implements some util functions to encrypt and decrypt.
-package cryptor
-
-import (
-	"crypto/rand"
-	"crypto/rsa"
-	"crypto/x509"
-	"encoding/pem"
-	"os"
-)
-
-// GenerateRsaKey make  a rsa private key, and return key file name
-// Generated key file is `rsa_private.pem` and `rsa_public.pem` in current path
-func GenerateRsaKey(keySize int, priKeyFile, pubKeyFile string) error {
-	// private key
-	privateKey, err := rsa.GenerateKey(rand.Reader, keySize)
-	if err != nil {
-		return err
-	}
-
-	derText := x509.MarshalPKCS1PrivateKey(privateKey)
-
-	block := pem.Block{
-		Type:  "rsa private key",
-		Bytes: derText,
-	}
-
-	//file,err := os.Create("rsa_private.pem")
-	file, err := os.Create(priKeyFile)
-	if err != nil {
-		panic(err)
-	}
-	pem.Encode(file, &block)
-	file.Close()
-
-	// public key
-	publicKey := privateKey.PublicKey
-
-	derpText, err := x509.MarshalPKIXPublicKey(&publicKey)
-	if err != nil {
-		return err
-	}
-
-	block = pem.Block{
-		Type:  "rsa public key",
-		Bytes: derpText,
-	}
-
-	//file,err = os.Create("rsa_public.pem")
-	file, err = os.Create(pubKeyFile)
-	if err != nil {
-		return err
-	}
-	pem.Encode(file, &block)
-	file.Close()
-
-	return nil
-}
-
-// RsaEncrypt encrypt data with ras algorithm
-func RsaEncrypt(data []byte, pubKeyFileName string) []byte {
-	file, err := os.Open(pubKeyFileName)
-	if err != nil {
-		panic(err)
-	}
-	fileInfo, err := file.Stat()
-	if err != nil {
-		panic(err)
-	}
-	defer file.Close()
-	buf := make([]byte, fileInfo.Size())
-	file.Read(buf)
-
-	block, _ := pem.Decode(buf)
-
-	pubInterface, err := x509.ParsePKIXPublicKey(block.Bytes)
-	if err != nil {
-		panic(err)
-	}
-	pubKey := pubInterface.(*rsa.PublicKey)
-
-	cipherText, err := rsa.EncryptPKCS1v15(rand.Reader, pubKey, data)
-	if err != nil {
-		panic(err)
-	}
-	return cipherText
-}
-
-// RsaDecrypt decrypt data with ras algorithm
-func RsaDecrypt(data []byte, privateKeyFileName string) []byte {
-	file, err := os.Open(privateKeyFileName)
-	if err != nil {
-		panic(err)
-	}
-	fileInfo, err := file.Stat()
-	if err != nil {
-		panic(err)
-	}
-	buf := make([]byte, fileInfo.Size())
-	defer file.Close()
-	file.Read(buf)
-
-	block, _ := pem.Decode(buf)
-
-	priKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
-	if err != nil {
-		panic(err)
-	}
-
-	plainText, err := rsa.DecryptPKCS1v15(rand.Reader, priKey, data)
-	if err != nil {
-		panic(err)
-	}
-	return plainText
-}
--- a/cryptor/rsa_test.go
+++ b/cryptor/rsa_test.go
@@ -1,20 +0,0 @@
-package cryptor
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-func TestRsaEncrypt(t *testing.T) {
-	err := GenerateRsaKey(4096, "rsa_private.pem", "rsa_public.pem")
-	if err != nil {
-		t.FailNow()
-	}
-	data := []byte("hello world")
-	encrypted := RsaEncrypt(data, "rsa_public.pem")
-	decrypted := RsaDecrypt(encrypted, "rsa_private.pem")
-
-	assert := internal.NewAssert(t, "TestRsaEncrypt")
-	assert.Equal(string(data), string(decrypted))
-}
--- a/datastructure/link/doublylink.go
+++ b/datastructure/link/doublylink.go
@@ -1,241 +0,0 @@
-package datastructure
-
-import (
-	"errors"
-	"fmt"
-
-	"github.com/duke-git/lancet/v2/datastructure"
-)
-
-// DoublyLink is a linked list. Whose node has a generic Value, Pre pointer points to a previous node of the link, Next pointer points to a next node of the link.
-type DoublyLink[T any] struct {
-	Head   *datastructure.LinkNode[T]
-	length int
-}
-
-// NewDoublyLink return *DoublyLink instance
-func NewDoublyLink[T any]() *DoublyLink[T] {
-	return &DoublyLink[T]{Head: nil}
-}
-
-// InsertAtHead insert value into doubly linklist at head index
-func (link *DoublyLink[T]) InsertAtHead(value T) {
-	newNode := datastructure.NewLinkNode(value)
-	size := link.Size()
-
-	if size == 0 {
-		link.Head = newNode
-		link.length++
-		return
-	}
-
-	newNode.Next = link.Head
-	newNode.Pre = nil
-
-	link.Head.Pre = newNode
-	link.Head = newNode
-
-	link.length++
-}
-
-// InsertAtTail insert value into doubly linklist at tail index
-func (link *DoublyLink[T]) InsertAtTail(value T) {
-	current := link.Head
-	if current == nil {
-		link.InsertAtHead(value)
-		return
-	}
-
-	for current.Next != nil {
-		current = current.Next
-	}
-
-	newNode := datastructure.NewLinkNode(value)
-	newNode.Next = nil
-	newNode.Pre = current
-	current.Next = newNode
-
-	link.length++
-}
-
-// InsertAt insert value into doubly linklist at index
-func (link *DoublyLink[T]) InsertAt(index int, value T) error {
-	size := link.length
-	if index < 0 || index > size {
-		return errors.New("param index should between 0 and the length of doubly link.")
-	}
-
-	if index == 0 {
-		link.InsertAtHead(value)
-		return nil
-	}
-
-	if index == size {
-		link.InsertAtTail(value)
-		return nil
-	}
-
-	i := 0
-	current := link.Head
-
-	for current != nil {
-		if i == index-1 {
-			newNode := datastructure.NewLinkNode(value)
-			newNode.Next = current.Next
-			newNode.Pre = current
-
-			current.Next = newNode
-			link.length++
-
-			return nil
-		}
-		i++
-		current = current.Next
-	}
-
-	return errors.New("doubly link list no exist")
-}
-
-// DeleteAtHead delete value in doubly linklist at head index
-func (link *DoublyLink[T]) DeleteAtHead() error {
-	if link.Head == nil {
-		return errors.New("doubly link list no exist")
-	}
-	current := link.Head
-	link.Head = current.Next
-	link.Head.Pre = nil
-	link.length--
-
-	return nil
-}
-
-// DeleteAtTail delete value in doubly linklist at tail index
-func (link *DoublyLink[T]) DeleteAtTail() error {
-	if link.Head == nil {
-		return errors.New("doubly link list no exist")
-	}
-	current := link.Head
-	if current.Next == nil {
-		return link.DeleteAtHead()
-	}
-
-	for current.Next.Next != nil {
-		current = current.Next
-	}
-
-	current.Next = nil
-	link.length--
-	return nil
-}
-
-// DeleteAt delete value in doubly linklist at index
-func (link *DoublyLink[T]) DeleteAt(index int) error {
-	if link.Head == nil {
-		return errors.New("doubly link list no exist")
-	}
-	current := link.Head
-	if current.Next == nil || index == 0 {
-		return link.DeleteAtHead()
-	}
-
-	if index == link.length-1 {
-		return link.DeleteAtTail()
-	}
-
-	if index < 0 || index > link.length-1 {
-		return errors.New("param index should between 0 and link size -1.")
-	}
-
-	i := 0
-	for current != nil {
-		if i == index-1 {
-			current.Next = current.Next.Next
-			link.length--
-			return nil
-		}
-		i++
-		current = current.Next
-	}
-
-	return errors.New("delete error")
-}
-
-// Reverse the linked list
-func (link *DoublyLink[T]) Reverse() {
-	current := link.Head
-	var temp *datastructure.LinkNode[T]
-
-	for current != nil {
-		temp = current.Pre
-		current.Pre = current.Next
-		current.Next = temp
-		current = current.Pre
-	}
-
-	if temp != nil {
-		link.Head = temp.Pre
-	}
-}
-
-// GetMiddleNode return node at middle index of linked list
-func (link *DoublyLink[T]) GetMiddleNode() *datastructure.LinkNode[T] {
-	if link.Head == nil {
-		return nil
-	}
-	if link.Head.Next == nil {
-		return link.Head
-	}
-	fast := link.Head
-	slow := link.Head
-
-	for fast != nil {
-		fast = fast.Next
-
-		if fast != nil {
-			fast = fast.Next
-			slow = slow.Next
-		} else {
-			return slow
-		}
-	}
-	return slow
-}
-
-// Size return the count of doubly linked list
-func (link *DoublyLink[T]) Size() int {
-	return link.length
-}
-
-// Values return slice of all doubly linklist node value
-func (link *DoublyLink[T]) Values() []T {
-	res := []T{}
-	current := link.Head
-	for current != nil {
-		res = append(res, current.Value)
-		current = current.Next
-	}
-	return res
-}
-
-// Print all nodes info of a linked list
-func (link *DoublyLink[T]) Print() {
-	current := link.Head
-	info := "[ "
-	for current != nil {
-		info += fmt.Sprintf("%+v, ", current)
-		current = current.Next
-	}
-	info += " ]"
-	fmt.Println(info)
-}
-
-// IsEmpty checks if link is empty or not
-func (link *DoublyLink[T]) IsEmpty() bool {
-	return link.length == 0
-}
-
-// Clear checks if link is empty or not
-func (link *DoublyLink[T]) Clear() {
-	link.Head = nil
-	link.length = 0
-}
--- a/datastructure/link/doublylink_test.go
+++ b/datastructure/link/doublylink_test.go
@@ -1,182 +0,0 @@
-package datastructure
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-func TestDoublyLink_InsertAtFirst(t *testing.T) {
-	assert := internal.NewAssert(t, "TestDoublyLink_InsertAtFirst")
-
-	link := NewDoublyLink[int]()
-	link.InsertAtHead(1)
-	link.InsertAtHead(2)
-	link.InsertAtHead(3)
-	link.Print()
-
-	expected := []int{3, 2, 1}
-	values := link.Values()
-
-	assert.Equal(expected, values)
-}
-
-func TestDoublyLink_InsertAtTail(t *testing.T) {
-	assert := internal.NewAssert(t, "TestDoublyLink_InsertAtTail")
-
-	link := NewDoublyLink[int]()
-	link.InsertAtTail(1)
-	link.InsertAtTail(2)
-	link.InsertAtTail(3)
-	link.Print()
-
-	expected := []int{1, 2, 3}
-	values := link.Values()
-
-	assert.Equal(expected, values)
-}
-
-func TestDoublyLink_InsertAt(t *testing.T) {
-	assert := internal.NewAssert(t, "TestDoublyLink_InsertAt")
-
-	link := NewDoublyLink[int]()
-
-	err := link.InsertAt(1, 1)
-	assert.IsNotNil(err)
-
-	err = link.InsertAt(0, 1)
-	err = link.InsertAt(1, 2)
-	err = link.InsertAt(2, 4)
-	err = link.InsertAt(2, 3)
-
-	if err != nil {
-		t.FailNow()
-	}
-	link.Print()
-
-	expected := []int{1, 2, 3, 4}
-	values := link.Values()
-
-	assert.Equal(expected, values)
-
-}
-
-func TestDoublyLink_DeleteAtHead(t *testing.T) {
-	assert := internal.NewAssert(t, "TestDoublyLink_DeleteAtHead")
-
-	link := NewDoublyLink[int]()
-	err := link.DeleteAtHead()
-	assert.IsNotNil(err)
-
-	link.InsertAtTail(1)
-	link.InsertAtTail(2)
-	link.InsertAtTail(3)
-	link.InsertAtTail(4)
-
-	link.DeleteAtHead()
-	link.Print()
-
-	expected := []int{2, 3, 4}
-	values := link.Values()
-
-	assert.Equal(expected, values)
-}
-
-func TestDoublyLink_DeleteAtTail(t *testing.T) {
-	assert := internal.NewAssert(t, "TestDoublyLink_DeleteAtTail")
-
-	link := NewDoublyLink[int]()
-	err := link.DeleteAtTail()
-	assert.IsNotNil(err)
-
-	link.InsertAtTail(1)
-	link.InsertAtTail(2)
-	link.InsertAtTail(3)
-	link.InsertAtTail(4)
-
-	link.DeleteAtTail()
-	link.Print()
-
-	expected := []int{1, 2, 3}
-	values := link.Values()
-
-	assert.Equal(expected, values)
-}
-
-func TestDoublyLink_DeleteAt(t *testing.T) {
-	assert := internal.NewAssert(t, "TestDoublyLink_DeleteAt")
-
-	link := NewDoublyLink[int]()
-	err := link.DeleteAt(0)
-	assert.IsNotNil(err)
-
-	link.InsertAtTail(1)
-	link.InsertAtTail(2)
-	link.InsertAtTail(3)
-	link.InsertAtTail(4)
-	link.InsertAtTail(5)
-
-	err = link.DeleteAt(5)
-	assert.IsNotNil(err)
-
-	err = link.DeleteAt(0)
-	assert.IsNil(err)
-	assert.Equal([]int{2, 3, 4, 5}, link.Values())
-
-	link.DeleteAt(3)
-	assert.Equal([]int{2, 3, 4}, link.Values())
-
-	link.DeleteAt(1)
-	assert.Equal(2, link.Size())
-	assert.Equal([]int{2, 4}, link.Values())
-}
-
-func TestDoublyLink_Reverse(t *testing.T) {
-	assert := internal.NewAssert(t, "TestDoublyLink_Reverse")
-
-	link := NewDoublyLink[int]()
-	link.InsertAtTail(1)
-	link.InsertAtTail(2)
-	link.InsertAtTail(3)
-	link.InsertAtTail(4)
-
-	link.Reverse()
-	link.Print()
-	assert.Equal([]int{4, 3, 2, 1}, link.Values())
-}
-
-func TestDoublyLink_GetMiddleNode(t *testing.T) {
-	assert := internal.NewAssert(t, "TestDoublyLink_GetMiddleNode")
-
-	link := NewDoublyLink[int]()
-	link.InsertAtTail(1)
-	link.InsertAtTail(2)
-	link.InsertAtTail(3)
-	link.InsertAtTail(4)
-
-	middle1 := link.GetMiddleNode()
-	assert.Equal(3, middle1.Value)
-
-	link.InsertAtTail(5)
-	link.InsertAtTail(6)
-	link.InsertAtTail(7)
-	middle2 := link.GetMiddleNode()
-	assert.Equal(4, middle2.Value)
-}
-
-func TestDoublyLink_Clear(t *testing.T) {
-	assert := internal.NewAssert(t, "TestDoublyLink_Clear")
-
-	link := NewDoublyLink[int]()
-
-	assert.Equal(true, link.IsEmpty())
-	assert.Equal(0, link.Size())
-
-	link.InsertAtTail(1)
-	assert.Equal(false, link.IsEmpty())
-	assert.Equal(1, link.Size())
-
-	link.Clear()
-	assert.Equal(true, link.IsEmpty())
-	assert.Equal(0, link.Size())
-}
--- a/datastructure/link/singlylink.go
+++ b/datastructure/link/singlylink.go
@@ -1,224 +0,0 @@
-package datastructure
-
-import (
-	"errors"
-	"fmt"
-
-	"github.com/duke-git/lancet/v2/datastructure"
-)
-
-// SinglyLink is a linked list. Whose node has a Value generics and Next pointer points to a next node of the link.
-type SinglyLink[T any] struct {
-	Head   *datastructure.LinkNode[T]
-	length int
-}
-
-// NewSinglyLink return *SinglyLink instance
-func NewSinglyLink[T any]() *SinglyLink[T] {
-	return &SinglyLink[T]{Head: nil}
-}
-
-// InsertAtHead insert value into singly linklist at head index
-func (link *SinglyLink[T]) InsertAtHead(value T) {
-	newNode := datastructure.NewLinkNode(value)
-	newNode.Next = link.Head
-	link.Head = newNode
-	link.length++
-}
-
-// InsertAtTail insert value into singly linklist at tail index
-func (link *SinglyLink[T]) InsertAtTail(value T) {
-	current := link.Head
-	if current == nil {
-		link.InsertAtHead(value)
-		return
-	}
-
-	for current.Next != nil {
-		current = current.Next
-	}
-
-	newNode := datastructure.NewLinkNode(value)
-	newNode.Next = nil
-	current.Next = newNode
-
-	link.length++
-}
-
-// InsertAt insert value into singly linklist at index
-func (link *SinglyLink[T]) InsertAt(index int, value T) error {
-	size := link.length
-	if index < 0 || index > size {
-		return errors.New("param index should between 0 and the length of singly link.")
-	}
-
-	if index == 0 {
-		link.InsertAtHead(value)
-		return nil
-	}
-
-	if index == size {
-		link.InsertAtTail(value)
-		return nil
-	}
-
-	i := 0
-	current := link.Head
-
-	for current != nil {
-		if i == index-1 {
-			newNode := datastructure.NewLinkNode(value)
-			newNode.Next = current.Next
-			current.Next = newNode
-			link.length++
-
-			return nil
-		}
-		i++
-		current = current.Next
-	}
-
-	return errors.New("singly link list no exist")
-}
-
-// DeleteAtHead delete value in singly linklist at head index
-func (link *SinglyLink[T]) DeleteAtHead() error {
-	if link.Head == nil {
-		return errors.New("singly link list no exist")
-	}
-	current := link.Head
-	link.Head = current.Next
-	link.length--
-
-	return nil
-}
-
-// DeleteAtTail delete value in singly linklist at tail index
-func (link *SinglyLink[T]) DeleteAtTail() error {
-	if link.Head == nil {
-		return errors.New("singly link list no exist")
-	}
-	current := link.Head
-	if current.Next == nil {
-		return link.DeleteAtHead()
-	}
-
-	for current.Next.Next != nil {
-		current = current.Next
-	}
-
-	current.Next = nil
-	link.length--
-	return nil
-}
-
-// DeleteAt delete value in singly linklist at index
-func (link *SinglyLink[T]) DeleteAt(index int) error {
-	if link.Head == nil {
-		return errors.New("singly link list no exist")
-	}
-	current := link.Head
-	if current.Next == nil || index == 0 {
-		return link.DeleteAtHead()
-	}
-
-	if index == link.length-1 {
-		return link.DeleteAtTail()
-	}
-
-	if index < 0 || index > link.length-1 {
-		return errors.New("param index should between 0 and link size -1.")
-	}
-
-	i := 0
-	for current != nil {
-		if i == index-1 {
-			current.Next = current.Next.Next
-			link.length--
-			return nil
-		}
-		i++
-		current = current.Next
-	}
-
-	return errors.New("delete error")
-}
-
-// Reverse the linked list
-func (link *SinglyLink[T]) Reverse() {
-	var pre, next *datastructure.LinkNode[T]
-
-	current := link.Head
-
-	for current != nil {
-		next = current.Next
-		current.Next = pre
-		pre = current
-		current = next
-	}
-
-	link.Head = pre
-}
-
-// GetMiddleNode return node at middle index of linked list
-func (link *SinglyLink[T]) GetMiddleNode() *datastructure.LinkNode[T] {
-	if link.Head == nil {
-		return nil
-	}
-	if link.Head.Next == nil {
-		return link.Head
-	}
-	fast := link.Head
-	slow := link.Head
-
-	for fast != nil {
-		fast = fast.Next
-
-		if fast != nil {
-			fast = fast.Next
-			slow = slow.Next
-		} else {
-			return slow
-		}
-	}
-	return slow
-}
-
-// Size return the count of singly linked list
-func (link *SinglyLink[T]) Size() int {
-	return link.length
-}
-
-// Values return slice of all singly linklist node value
-func (link *SinglyLink[T]) Values() []T {
-	res := []T{}
-	current := link.Head
-	for current != nil {
-		res = append(res, current.Value)
-		current = current.Next
-	}
-	return res
-}
-
-// IsEmpty checks if link is empty or not
-func (link *SinglyLink[T]) IsEmpty() bool {
-	return link.length == 0
-}
-
-// Clear checks if link is empty or not
-func (link *SinglyLink[T]) Clear() {
-	link.Head = nil
-	link.length = 0
-}
-
-// Print all nodes info of a linked list
-func (link *SinglyLink[T]) Print() {
-	current := link.Head
-	info := "[ "
-	for current != nil {
-		info += fmt.Sprintf("%+v, ", current)
-		current = current.Next
-	}
-	info += " ]"
-	fmt.Println(info)
-}
--- a/datastructure/link/singlylink_test.go
+++ b/datastructure/link/singlylink_test.go
@@ -1,182 +0,0 @@
-package datastructure
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-func TestSinglyLink_InsertAtFirst(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSinglyLink_InsertAtFirst")
-
-	link := NewSinglyLink[int]()
-	link.InsertAtHead(1)
-	link.InsertAtHead(2)
-	link.InsertAtHead(3)
-	link.Print()
-
-	expected := []int{3, 2, 1}
-	values := link.Values()
-
-	assert.Equal(expected, values)
-}
-
-func TestSinglyLink_InsertAtTail(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSinglyLink_InsertAtTail")
-
-	link := NewSinglyLink[int]()
-	link.InsertAtTail(1)
-	link.InsertAtTail(2)
-	link.InsertAtTail(3)
-	link.Print()
-
-	expected := []int{1, 2, 3}
-	values := link.Values()
-
-	assert.Equal(expected, values)
-}
-
-func TestSinglyLink_InsertAt(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSinglyLink_InsertAt")
-
-	link := NewSinglyLink[int]()
-
-	err := link.InsertAt(1, 1)
-	assert.IsNotNil(err)
-
-	err = link.InsertAt(0, 1)
-	err = link.InsertAt(1, 2)
-	err = link.InsertAt(2, 4)
-	err = link.InsertAt(2, 3)
-
-	if err != nil {
-		t.FailNow()
-	}
-	link.Print()
-
-	expected := []int{1, 2, 3, 4}
-	values := link.Values()
-
-	assert.Equal(expected, values)
-
-}
-
-func TestSinglyLink_DeleteAtHead(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSinglyLink_DeleteAtHead")
-
-	link := NewSinglyLink[int]()
-	err := link.DeleteAtHead()
-	assert.IsNotNil(err)
-
-	link.InsertAtTail(1)
-	link.InsertAtTail(2)
-	link.InsertAtTail(3)
-	link.InsertAtTail(4)
-
-	link.DeleteAtHead()
-	link.Print()
-
-	expected := []int{2, 3, 4}
-	values := link.Values()
-
-	assert.Equal(expected, values)
-}
-
-func TestSinglyLink_DeleteAtTail(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSinglyLink_DeleteAtTail")
-
-	link := NewSinglyLink[int]()
-	err := link.DeleteAtTail()
-	assert.IsNotNil(err)
-
-	link.InsertAtTail(1)
-	link.InsertAtTail(2)
-	link.InsertAtTail(3)
-	link.InsertAtTail(4)
-
-	link.DeleteAtTail()
-	link.Print()
-
-	expected := []int{1, 2, 3}
-	values := link.Values()
-
-	assert.Equal(expected, values)
-}
-
-func TestSinglyLink_DeleteAt(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSinglyLink_DeleteAt")
-
-	link := NewSinglyLink[int]()
-	err := link.DeleteAt(0)
-	assert.IsNotNil(err)
-
-	link.InsertAtTail(1)
-	link.InsertAtTail(2)
-	link.InsertAtTail(3)
-	link.InsertAtTail(4)
-	link.InsertAtTail(5)
-
-	err = link.DeleteAt(5)
-	assert.IsNotNil(err)
-
-	err = link.DeleteAt(0)
-	assert.IsNil(err)
-	assert.Equal([]int{2, 3, 4, 5}, link.Values())
-
-	link.DeleteAt(3)
-	assert.Equal([]int{2, 3, 4}, link.Values())
-
-	link.DeleteAt(1)
-	assert.Equal(2, link.Size())
-	assert.Equal([]int{2, 4}, link.Values())
-}
-
-func TestSinglyLink_Reverse(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSinglyLink_Reverse")
-
-	link := NewSinglyLink[int]()
-	link.InsertAtTail(1)
-	link.InsertAtTail(2)
-	link.InsertAtTail(3)
-	link.InsertAtTail(4)
-
-	link.Reverse()
-	link.Print()
-	assert.Equal([]int{4, 3, 2, 1}, link.Values())
-}
-
-func TestSinglyLink_GetMiddleNode(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSinglyLink_GetMiddleNode")
-
-	link := NewSinglyLink[int]()
-	link.InsertAtTail(1)
-	link.InsertAtTail(2)
-	link.InsertAtTail(3)
-	link.InsertAtTail(4)
-
-	middle1 := link.GetMiddleNode()
-	assert.Equal(3, middle1.Value)
-
-	link.InsertAtTail(5)
-	link.InsertAtTail(6)
-	link.InsertAtTail(7)
-	middle2 := link.GetMiddleNode()
-	assert.Equal(4, middle2.Value)
-}
-
-func TestSinglyLink_Clear(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSinglyLink_Clear")
-
-	link := NewSinglyLink[int]()
-
-	assert.Equal(true, link.IsEmpty())
-	assert.Equal(0, link.Size())
-
-	link.InsertAtTail(1)
-	assert.Equal(false, link.IsEmpty())
-	assert.Equal(1, link.Size())
-
-	link.Clear()
-	assert.Equal(true, link.IsEmpty())
-	assert.Equal(0, link.Size())
-}
--- a/datastructure/list/list.go
+++ b/datastructure/list/list.go
@@ -1,245 +0,0 @@
-// Copyright 2021 dudaodong@gmail.com. All rights reserved.
-// Use of this source code is governed by MIT license
-
-// Package datastructure implements some data structure. eg. list, linklist, stack, queue, tree, graph.
-package datastructure
-
-import (
-	"reflect"
-)
-
-// List is a linear table, implemented with slice
-type List[T any] struct {
-	data []T
-}
-
-// NewList return a pointer of List
-func NewList[T any](data []T) *List[T] {
-	return &List[T]{data: data}
-}
-
-// Data return list data
-func (l *List[T]) Data() []T {
-	return l.data
-}
-
-// ValueOf return the value pointer at index of list data.
-func (l *List[T]) ValueOf(index int) (*T, bool) {
-	if index < 0 || index >= len(l.data) {
-		return nil, false
-	}
-	return &l.data[index], true
-}
-
-// IndexOf reture the index of value. if not found return -1
-func (l *List[T]) IndexOf(value T) int {
-	index := -1
-	data := l.data
-	for i, v := range data {
-		if reflect.DeepEqual(v, value) {
-			index = i
-			break
-		}
-	}
-	return index
-}
-
-// Contain checks if the value in the list or not
-func (l *List[T]) Contain(value T) bool {
-	data := l.data
-	for _, v := range data {
-		if reflect.DeepEqual(v, value) {
-			return true
-		}
-	}
-	return false
-}
-
-// Push append value to the list data
-func (l *List[T]) Push(value T) {
-	l.data = append(l.data, value)
-}
-
-// InsertAtFirst insert value into list at first index
-func (l *List[T]) InsertAtFirst(value T) {
-	l.InsertAt(0, value)
-}
-
-// InsertAtLast insert value into list at last index
-func (l *List[T]) InsertAtLast(value T) {
-	l.InsertAt(len(l.data), value)
-}
-
-// InsertAt insert value into list at index
-func (l *List[T]) InsertAt(index int, value T) {
-	data := l.data
-	size := len(data)
-
-	if index < 0 || index > size {
-		return
-	}
-	l.data = append(data[:index], append([]T{value}, data[index:]...)...)
-}
-
-// PopFirst delete the first value of list and return it
-func (l *List[T]) PopFirst() (*T, bool) {
-	if len(l.data) == 0 {
-		return nil, false
-	}
-
-	v := l.data[0]
-	l.DeleteAt(0)
-
-	return &v, true
-}
-
-// PopLast delete the last value of list and return it
-func (l *List[T]) PopLast() (*T, bool) {
-	size := len(l.data)
-	if size == 0 {
-		return nil, false
-	}
-
-	v := l.data[size-1]
-	l.DeleteAt(size - 1)
-
-	return &v, true
-}
-
-// DeleteAt delete the value of list at index
-func (l *List[T]) DeleteAt(index int) {
-	data := l.data
-	size := len(data)
-	if index < 0 || index > size-1 {
-		return
-	}
-	if index == size-1 {
-		data = append(data[:index])
-	} else {
-		data = append(data[:index], data[index+1:]...)
-	}
-	l.data = data
-}
-
-// UpdateAt update value of list at index, index shoud between 0 and list size -1
-func (l *List[T]) UpdateAt(index int, value T) {
-	data := l.data
-	size := len(data)
-
-	if index < 0 || index >= size {
-		return
-	}
-	l.data = append(data[:index], append([]T{value}, data[index+1:]...)...)
-}
-
-// Equtal compare list to other list, use reflect.DeepEqual
-func (l *List[T]) Equtal(other *List[T]) bool {
-	if len(l.data) != len(other.data) {
-		return false
-	}
-
-	for i := 0; i < len(l.data); i++ {
-		if !reflect.DeepEqual(l.data[i], other.data[i]) {
-			return false
-		}
-	}
-
-	return true
-}
-
-// IsEmpty check if the list is empty or not
-func (l *List[T]) IsEmpty() bool {
-	return len(l.data) == 0
-}
-
-// Clear the data of list
-func (l *List[T]) Clear() {
-	l.data = make([]T, 0, 0)
-}
-
-// Clone return a copy of list
-func (l *List[T]) Clone() *List[T] {
-	cl := NewList(make([]T, len(l.data)))
-	copy(cl.data, l.data)
-
-	return cl
-}
-
-// Merge two list, return new list, don't change original list
-func (l *List[T]) Merge(other *List[T]) *List[T] {
-	l1, l2 := len(l.data), len(other.data)
-	ml := NewList(make([]T, l1+l2, l1+l2))
-
-	data := append([]T{}, append(l.data, other.data...)...)
-	ml.data = data
-
-	return ml
-}
-
-// Size return number of list data items
-func (l *List[T]) Size() int {
-	return len(l.data)
-}
-
-// Swap the value of index i and j in list
-func (l *List[T]) Swap(i, j int) {
-	size := len(l.data)
-	if i < 0 || i >= size || j < 0 || j >= size {
-		return
-	}
-	l.data[i], l.data[j] = l.data[j], l.data[i]
-}
-
-// Reverse the item order of list
-func (l *List[T]) Reverse() {
-	for i, j := 0, len(l.data)-1; i < j; i, j = i+1, j-1 {
-		l.data[i], l.data[j] = l.data[j], l.data[i]
-	}
-}
-
-// Unique remove duplicate items in list
-func (l *List[T]) Unique() {
-	data := l.data
-	size := len(data)
-
-	uniqueData := make([]T, 0, 0)
-	for i := 0; i < size; i++ {
-		value := data[i]
-		skip := true
-		for _, v := range uniqueData {
-			if reflect.DeepEqual(value, v) {
-				skip = false
-				break
-			}
-		}
-		if skip {
-			uniqueData = append(uniqueData, value)
-		}
-	}
-
-	l.data = uniqueData
-}
-
-// Union creates a new list contain all element in list l and other, remove duplicate element.
-func (l *List[T]) Union(other *List[T]) *List[T] {
-	res := NewList([]T{})
-
-	res.data = append(res.data, l.data...)
-	res.data = append(res.data, other.data...)
-	res.Unique()
-
-	return res
-}
-
-// Intersection creates a new list whose element both be contained in list l and other
-func (l *List[T]) Intersection(other *List[T]) *List[T] {
-	res := NewList(make([]T, 0, 0))
-
-	for _, v := range l.data {
-		if other.Contain(v) {
-			res.data = append(res.data, v)
-		}
-	}
-
-	return res
-}
--- a/datastructure/list/list_test.go
+++ b/datastructure/list/list_test.go
@@ -1,272 +0,0 @@
-package datastructure
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-func TestListData(t *testing.T) {
-	assert := internal.NewAssert(t, "TestListData")
-
-	list := NewList([]int{1, 2, 3})
-	assert.Equal([]int{1, 2, 3}, list.Data())
-}
-
-func TestValueOf(t *testing.T) {
-	assert := internal.NewAssert(t, "TestValueOf")
-
-	list := NewList([]int{1, 2, 3})
-	v, ok := list.ValueOf(0)
-	assert.Equal(1, *v)
-	assert.Equal(true, ok)
-
-	_, ok = list.ValueOf(3)
-	assert.Equal(false, ok)
-}
-
-func TestIndexOf(t *testing.T) {
-	assert := internal.NewAssert(t, "TestIndexOf")
-
-	list := NewList([]int{1, 2, 3})
-	i := list.IndexOf(1)
-	assert.Equal(0, i)
-
-	i = list.IndexOf(4)
-	assert.Equal(-1, i)
-}
-
-func TestContain(t *testing.T) {
-	assert := internal.NewAssert(t, "TestContain")
-
-	list := NewList([]int{1, 2, 3})
-	assert.Equal(true, list.Contain(1))
-	assert.Equal(false, list.Contain(0))
-}
-
-func TestPush(t *testing.T) {
-	assert := internal.NewAssert(t, "TestPush")
-
-	list := NewList([]int{1, 2, 3})
-	list.Push(4)
-
-	assert.Equal([]int{1, 2, 3, 4}, list.Data())
-}
-
-func TestInsertAtFirst(t *testing.T) {
-	assert := internal.NewAssert(t, "TestInsertAtFirst")
-
-	list := NewList([]int{1, 2, 3})
-	list.InsertAtFirst(0)
-
-	assert.Equal([]int{0, 1, 2, 3}, list.Data())
-}
-
-func TestInsertAtLast(t *testing.T) {
-	assert := internal.NewAssert(t, "TestInsertAtLast")
-
-	list := NewList([]int{1, 2, 3})
-	list.InsertAtLast(4)
-
-	assert.Equal([]int{1, 2, 3, 4}, list.Data())
-}
-
-func TestInsertAt(t *testing.T) {
-	assert := internal.NewAssert(t, "TestInsertAt")
-
-	list := NewList([]int{1, 2, 3})
-
-	list.InsertAt(-1, 0)
-	assert.Equal([]int{1, 2, 3}, list.Data())
-
-	list.InsertAt(4, 0)
-	assert.Equal([]int{1, 2, 3}, list.Data())
-
-	list.InsertAt(0, 0)
-	assert.Equal([]int{0, 1, 2, 3}, list.Data())
-
-	list.InsertAt(4, 4)
-	assert.Equal([]int{0, 1, 2, 3, 4}, list.Data())
-}
-
-func TestPopFirst(t *testing.T) {
-	assert := internal.NewAssert(t, "TestPopFirst")
-
-	list := NewList([]int{1, 2, 3})
-	v, ok := list.PopFirst()
-	assert.Equal(1, *v)
-	assert.Equal(true, ok)
-	assert.Equal([]int{2, 3}, list.Data())
-
-	list2 := NewList([]int{})
-	v, ok = list2.PopFirst()
-	assert.Equal(false, ok)
-	assert.Equal([]int{}, list2.Data())
-}
-
-func TestPopLast(t *testing.T) {
-	assert := internal.NewAssert(t, "TestPopLast")
-
-	list := NewList([]int{1, 2, 3})
-	v, ok := list.PopLast()
-	assert.Equal(3, *v)
-	assert.Equal(true, ok)
-	assert.Equal([]int{1, 2}, list.Data())
-
-	list2 := NewList([]int{})
-	v, ok = list2.PopLast()
-	assert.Equal(false, ok)
-	assert.Equal([]int{}, list2.Data())
-}
-
-func TestDeleteAt(t *testing.T) {
-	assert := internal.NewAssert(t, "TestDeleteAt")
-
-	list := NewList([]int{1, 2, 3, 4})
-
-	list.DeleteAt(-1)
-	assert.Equal([]int{1, 2, 3, 4}, list.Data())
-
-	list.DeleteAt(4)
-	assert.Equal([]int{1, 2, 3, 4}, list.Data())
-
-	list.DeleteAt(0)
-	assert.Equal([]int{2, 3, 4}, list.Data())
-
-	list.DeleteAt(2)
-	assert.Equal([]int{2, 3}, list.Data())
-}
-
-func TestUpdateAt(t *testing.T) {
-	assert := internal.NewAssert(t, "TestUpdateAt")
-
-	list := NewList([]int{1, 2, 3, 4})
-
-	list.UpdateAt(-1, 0)
-	assert.Equal([]int{1, 2, 3, 4}, list.Data())
-
-	list.UpdateAt(4, 0)
-	assert.Equal([]int{1, 2, 3, 4}, list.Data())
-
-	list.UpdateAt(0, 5)
-	assert.Equal([]int{5, 2, 3, 4}, list.Data())
-
-	list.UpdateAt(3, 1)
-	assert.Equal([]int{5, 2, 3, 1}, list.Data())
-}
-
-func TestEqutal(t *testing.T) {
-	assert := internal.NewAssert(t, "TestEqutal")
-
-	list1 := NewList([]int{1, 2, 3, 4})
-	list2 := NewList([]int{1, 2, 3, 4})
-	list3 := NewList([]int{1, 2, 3})
-
-	assert.Equal(true, list1.Equtal(list2))
-	assert.Equal(false, list1.Equtal(list3))
-}
-
-func TestIsEmpty(t *testing.T) {
-	assert := internal.NewAssert(t, "TestIsEmpty")
-
-	list1 := NewList([]int{1, 2, 3, 4})
-	list2 := NewList([]int{})
-
-	assert.Equal(false, list1.IsEmpty())
-	assert.Equal(true, list2.IsEmpty())
-}
-
-func TestIsClear(t *testing.T) {
-	assert := internal.NewAssert(t, "TestIsClear")
-
-	list1 := NewList([]int{1, 2, 3, 4})
-	list1.Clear()
-	empty := NewList([]int{})
-
-	assert.Equal(empty, list1)
-}
-
-func TestClone(t *testing.T) {
-	assert := internal.NewAssert(t, "TestClone")
-
-	list1 := NewList([]int{1, 2, 3, 4})
-	list2 := list1.Clone()
-
-	assert.Equal(true, list1.Equtal(list2))
-}
-
-func TestMerge(t *testing.T) {
-	assert := internal.NewAssert(t, "TestMerge")
-
-	list1 := NewList([]int{1, 2, 3, 4})
-	list2 := NewList([]int{4, 5, 6})
-	expected := NewList([]int{1, 2, 3, 4, 4, 5, 6})
-
-	list3 := list1.Merge(list2)
-	assert.Equal(true, expected.Equtal(list3))
-}
-
-func TestSize(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSize")
-
-	list := NewList([]int{1, 2, 3, 4})
-	empty := NewList([]int{})
-
-	assert.Equal(4, list.Size())
-	assert.Equal(0, empty.Size())
-}
-
-func TestSwap(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSwap")
-
-	list := NewList([]int{1, 2, 3, 4})
-	expected := NewList([]int{4, 2, 3, 1})
-
-	list.Swap(0, 3)
-
-	assert.Equal(true, expected.Equtal(list))
-}
-
-func TestReverse(t *testing.T) {
-	assert := internal.NewAssert(t, "TestReverse")
-
-	list := NewList([]int{1, 2, 3, 4})
-	expected := NewList([]int{4, 3, 2, 1})
-
-	list.Reverse()
-
-	assert.Equal(true, expected.Equtal(list))
-}
-
-func TestUnique(t *testing.T) {
-	assert := internal.NewAssert(t, "TestUnique")
-
-	list := NewList([]int{1, 2, 2, 3, 4})
-	expected := NewList([]int{1, 2, 3, 4})
-
-	list.Unique()
-
-	assert.Equal(true, expected.Equtal(list))
-}
-
-func TestUnion(t *testing.T) {
-	assert := internal.NewAssert(t, "TestUnion")
-
-	list1 := NewList([]int{1, 2, 3, 4})
-	list2 := NewList([]int{4, 5, 6})
-	expected := NewList([]int{1, 2, 3, 4, 5, 6})
-
-	list3 := list1.Union(list2)
-	assert.Equal(true, expected.Equtal(list3))
-}
-
-func TestIntersection(t *testing.T) {
-	assert := internal.NewAssert(t, "TestIntersection")
-
-	list1 := NewList([]int{1, 2, 3, 4})
-	list2 := NewList([]int{4, 5, 6})
-	expected := NewList([]int{4})
-
-	list3 := list1.Intersection(list2)
-	assert.Equal(true, expected.Equtal(list3))
-}
--- a/datastructure/node.go
+++ b/datastructure/node.go
@@ -1,47 +0,0 @@
-package datastructure
-
-// LinkNode is a linkedlist node, which have a Value and Pre points to previous node, Next points to a next node of the link.
-type LinkNode[T any] struct {
-	Value T
-	Pre   *LinkNode[T]
-	Next  *LinkNode[T]
-}
-
-// NewLinkNode return a LinkNode pointer
-func NewLinkNode[T any](value T) *LinkNode[T] {
-	return &LinkNode[T]{value, nil, nil}
-}
-
-// StackNode is a node in stack, which have a Value and Next pointer points to next node in the stack.
-type StackNode[T any] struct {
-	Value T
-	Next  *StackNode[T]
-}
-
-// NewStackNode return a StackNode pointer
-func NewStackNode[T any](value T) *StackNode[T] {
-	return &StackNode[T]{value, nil}
-}
-
-// QueueNode is a node in a queue, which have a Value and Next pointer points to next node in the queue.
-type QueueNode[T any] struct {
-	Value T
-	Next  *QueueNode[T]
-}
-
-// NewQueueNode return a QueueNode pointer
-func NewQueueNode[T any](value T) *QueueNode[T] {
-	return &QueueNode[T]{value, nil}
-}
-
-// TreeNode is node of tree
-type TreeNode[T any] struct {
-	Data  T
-	Left  *TreeNode[T]
-	Right *TreeNode[T]
-}
-
-// NewTreeNode return a TreeNode pointer
-func NewTreeNode[T any](data T) *TreeNode[T] {
-	return &TreeNode[T]{data, nil, nil}
-}
--- a/datastructure/queue/arrayqueue.go
+++ b/datastructure/queue/arrayqueue.go
@@ -1,92 +0,0 @@
-package datastructure
-
-import (
-	"errors"
-	"fmt"
-	"reflect"
-)
-
-// ArrayQueue implements queue with slice
-type ArrayQueue[T any] struct {
-	data   []T
-	length int
-}
-
-// NewArrayQueue return a empty ArrayQueue pointer
-func NewArrayQueue[T any](values ...T) *ArrayQueue[T] {
-	data := make([]T, len(values))
-	for i, v := range values {
-		data[i] = v
-	}
-	return &ArrayQueue[T]{data: data, length: len(values)}
-}
-
-// Data return queue data
-func (q *ArrayQueue[T]) Data() []T {
-	return q.data
-}
-
-// Size return length of queue data
-func (q *ArrayQueue[T]) Size() int {
-	return q.length
-}
-
-// IsEmpty checks if queue is empty or not
-func (q *ArrayQueue[T]) IsEmpty() bool {
-	return q.length == 0
-}
-
-// Front return front value of queue
-func (q *ArrayQueue[T]) Front() T {
-	return q.data[0]
-}
-
-// Back return back value of queue
-func (q *ArrayQueue[T]) Back() T {
-	return q.data[q.length-1]
-}
-
-// EnQueue put element into queue
-func (q *ArrayQueue[T]) EnQueue(value T) {
-	q.data = append(q.data, value)
-	q.length++
-}
-
-// DeQueue remove head element of queue and return it, if queue is empty, return nil and error
-func (q *ArrayQueue[T]) DeQueue() (*T, error) {
-	if q.IsEmpty() {
-		return nil, errors.New("queue is empty")
-	}
-
-	headItem := q.data[0]
-	q.data = q.data[1:]
-	q.length--
-
-	return &headItem, nil
-}
-
-// Clear the queue data
-func (q *ArrayQueue[T]) Clear() {
-	q.data = []T{}
-	q.length = 0
-}
-
-// Contain checks if the value is in queue or not
-func (q *ArrayQueue[T]) Contain(value T) bool {
-	for _, v := range q.data {
-		if reflect.DeepEqual(v, value) {
-			return true
-		}
-	}
-	return false
-}
-
-// Print queue data
-func (q *ArrayQueue[T]) Print() {
-	info := "["
-	for _, v := range q.data {
-		info += fmt.Sprintf("%+v, ", v)
-	}
-	info += "]"
-	fmt.Println(info)
-}
--- a/datastructure/queue/arrayqueue_test.go
+++ b/datastructure/queue/arrayqueue_test.go
@@ -1,90 +0,0 @@
-package datastructure
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-func TestArrayQueue_EnQueue(t *testing.T) {
-	assert := internal.NewAssert(t, "TestArrayQueue_EnQueue")
-
-	queue := NewArrayQueue[int]()
-	queue.EnQueue(1)
-	queue.EnQueue(2)
-	queue.EnQueue(3)
-
-	expected := []int{1, 2, 3}
-	data := queue.Data()
-	size := queue.Size()
-
-	queue.Print()
-
-	assert.Equal(expected, data)
-	assert.Equal(3, size)
-}
-
-func TestArrayQueue_DeQueue(t *testing.T) {
-	assert := internal.NewAssert(t, "TestArrayQueue_DeQueue")
-
-	queue := NewArrayQueue(1, 2, 3)
-
-	val, err := queue.DeQueue()
-	if err != nil {
-		t.Fail()
-	}
-
-	queue.Print()
-	assert.Equal(1, *val)
-
-	assert.Equal([]int{2, 3}, queue.Data())
-}
-
-func TestArrayQueue_Front(t *testing.T) {
-	assert := internal.NewAssert(t, "TestArrayQueue_Front")
-
-	queue := NewArrayQueue(1, 2, 3)
-	val := queue.Front()
-
-	queue.Print()
-
-	assert.Equal(1, val)
-	assert.Equal([]int{1, 2, 3}, queue.Data())
-}
-
-func TestArrayQueue_Back(t *testing.T) {
-	assert := internal.NewAssert(t, "TestArrayQueue_Back")
-
-	queue := NewArrayQueue(1, 2, 3)
-	val := queue.Back()
-
-	queue.Print()
-
-	assert.Equal(3, val)
-	assert.Equal([]int{1, 2, 3}, queue.Data())
-}
-
-func TestArrayQueue_Contain(t *testing.T) {
-	assert := internal.NewAssert(t, "TestArrayQueue_Contain")
-
-	queue := NewArrayQueue(1, 2, 3)
-
-	assert.Equal(true, queue.Contain(1))
-	assert.Equal(false, queue.Contain(4))
-}
-
-func TestArrayQueue_Clear(t *testing.T) {
-	assert := internal.NewAssert(t, "TestArrayQueue_Clear")
-
-	queue := NewArrayQueue[int]()
-	assert.Equal(true, queue.IsEmpty())
-	assert.Equal(0, queue.Size())
-
-	queue.EnQueue(1)
-	assert.Equal(false, queue.IsEmpty())
-	assert.Equal(1, queue.Size())
-
-	queue.Clear()
-	assert.Equal(true, queue.IsEmpty())
-	assert.Equal(0, queue.Size())
-}
--- a/datastructure/queue/circularqueue.go
+++ b/datastructure/queue/circularqueue.go
@@ -1,118 +0,0 @@
-package datastructure
-
-import (
-	"errors"
-	"fmt"
-	"reflect"
-)
-
-// CircularQueue implements circular queue with slice,
-// last index of CircularQueue don't contain value, so acturl capacity is size - 1
-type CircularQueue[T any] struct {
-	data  []T
-	front int
-	rear  int
-	size  int
-}
-
-// NewCircularQueue return a empty CircularQueue pointer
-func NewCircularQueue[T any](size int) *CircularQueue[T] {
-	data := make([]T, size)
-	return &CircularQueue[T]{data: data, front: 0, rear: 0, size: size}
-}
-
-// Data return queue data
-func (q *CircularQueue[T]) Data() []T {
-	data := []T{}
-
-	front := q.front
-	rear := q.rear
-	if front <= rear {
-		return q.data[front:rear]
-	}
-
-	data = append(data, q.data[front:]...)
-	data = append(data, q.data[0:rear]...)
-
-	return data
-}
-
-// Length return current data length of queue
-func (q *CircularQueue[T]) Length() int {
-	if q.size == 0 {
-		return 0
-	}
-	return (q.rear - q.front + q.size) % q.size
-}
-
-// IsEmpty checks if queue is empty or not
-func (q *CircularQueue[T]) IsEmpty() bool {
-	return q.front == q.rear
-}
-
-// IsFull checks if queue is full or not
-func (q *CircularQueue[T]) IsFull() bool {
-	return (q.rear+1)%q.size == q.front
-}
-
-// Front return front value of queue
-func (q *CircularQueue[T]) Front() T {
-	return q.data[q.front]
-}
-
-// Back return back value of queue
-func (q *CircularQueue[T]) Back() T {
-	if q.rear-1 >= 0 {
-		return q.data[q.rear-1]
-	}
-	return q.data[q.size-1]
-}
-
-// EnQueue put element into queue
-func (q *CircularQueue[T]) EnQueue(value T) error {
-	if q.IsFull() {
-		return errors.New("queue is full!")
-	}
-
-	q.data[q.rear] = value
-	q.rear = (q.rear + 1) % q.size
-
-	return nil
-}
-
-// DeQueue remove head element of queue and return it, if queue is empty, return nil and error
-func (q *CircularQueue[T]) DeQueue() (*T, error) {
-	if q.IsEmpty() {
-		return nil, errors.New("queue is empty")
-	}
-
-	headItem := q.data[q.front]
-	var t T
-	q.data[q.front] = t
-	q.front = (q.front + 1) % q.size
-
-	return &headItem, nil
-}
-
-// Clear the queue data
-func (q *CircularQueue[T]) Clear() {
-	q.data = []T{}
-	q.front = 0
-	q.rear = 0
-	q.size = 0
-}
-
-// Contain checks if the value is in queue or not
-func (q *CircularQueue[T]) Contain(value T) bool {
-	for _, v := range q.data {
-		if reflect.DeepEqual(v, value) {
-			return true
-		}
-	}
-	return false
-}
-
-// Print queue data
-func (q *CircularQueue[T]) Print() {
-	fmt.Printf("%+v\n", q)
-}
--- a/datastructure/queue/circularqueue_test.go
+++ b/datastructure/queue/circularqueue_test.go
@@ -1,148 +0,0 @@
-package datastructure
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-func TestCircularQueue_EnQueue(t *testing.T) {
-	assert := internal.NewAssert(t, "TestCircularQueue_EnQueue")
-
-	queue := NewCircularQueue[int](6)
-	queue.EnQueue(1)
-	queue.EnQueue(2)
-	queue.EnQueue(3)
-	queue.EnQueue(4)
-	queue.EnQueue(5)
-
-	queue.Print()
-	// assert.Equal([]int{1, 2, 3, 4, 5}, queue.Data())
-	assert.Equal(5, queue.Length())
-
-	err := queue.EnQueue(6)
-	assert.IsNotNil(err)
-}
-
-func TestCircularQueue_DeQueue(t *testing.T) {
-	assert := internal.NewAssert(t, "TestCircularQueue_DeQueue")
-
-	queue := NewCircularQueue[int](6)
-	assert.Equal(true, queue.IsEmpty())
-
-	queue.EnQueue(1)
-	queue.EnQueue(2)
-	queue.EnQueue(3)
-	queue.EnQueue(4)
-	queue.EnQueue(5)
-
-	val, err := queue.DeQueue()
-	assert.IsNil(err)
-
-	assert.Equal(1, *val)
-	assert.Equal(false, queue.IsFull())
-
-	val, _ = queue.DeQueue()
-	queue.Print()
-	assert.Equal(2, *val)
-
-	queue.EnQueue(6)
-	queue.Print()
-	assert.Equal(false, queue.IsFull())
-}
-
-func TestCircularQueue_Front(t *testing.T) {
-	assert := internal.NewAssert(t, "TestCircularQueue_Front")
-
-	queue := NewCircularQueue[int](6)
-	queue.EnQueue(1)
-	queue.EnQueue(2)
-	queue.EnQueue(3)
-	queue.EnQueue(4)
-	queue.EnQueue(5)
-
-	queue.Print()
-
-	queue.DeQueue()
-	queue.DeQueue()
-	queue.EnQueue(6)
-	queue.EnQueue(7)
-
-	queue.Print()
-
-	val := queue.Front()
-	assert.Equal(3, val)
-	assert.Equal(5, queue.Length())
-}
-
-func TestCircularQueue_Back(t *testing.T) {
-	assert := internal.NewAssert(t, "TestCircularQueue_Back")
-
-	queue := NewCircularQueue[int](6)
-	assert.Equal(true, queue.IsEmpty())
-
-	queue.EnQueue(1)
-	queue.EnQueue(2)
-	queue.EnQueue(3)
-	queue.EnQueue(4)
-	queue.EnQueue(5)
-
-	queue.Print()
-	assert.Equal(5, queue.Back())
-
-	queue.DeQueue()
-	queue.DeQueue()
-	queue.EnQueue(6)
-	queue.EnQueue(7)
-
-	queue.Print()
-	assert.Equal(7, queue.Back())
-}
-
-func TestCircularQueue_Contain(t *testing.T) {
-	assert := internal.NewAssert(t, "TestCircularQueue_Contain")
-
-	queue := NewCircularQueue[int](2)
-	queue.EnQueue(1)
-	assert.Equal(true, queue.Contain(1))
-	assert.Equal(false, queue.Contain(2))
-}
-
-func TestCircularQueue_Clear(t *testing.T) {
-	assert := internal.NewAssert(t, "TestCircularQueue_Clear")
-
-	queue := NewCircularQueue[int](3)
-	assert.Equal(true, queue.IsEmpty())
-	assert.Equal(0, queue.Length())
-
-	queue.EnQueue(1)
-	assert.Equal(false, queue.IsEmpty())
-	assert.Equal(1, queue.Length())
-
-	queue.Clear()
-	assert.Equal(true, queue.IsEmpty())
-	assert.Equal(0, queue.Length())
-}
-
-func TestCircularQueue_Data(t *testing.T) {
-	assert := internal.NewAssert(t, "TestCircularQueue_Data")
-
-	queue := NewCircularQueue[int](6)
-	queue.EnQueue(1)
-	queue.EnQueue(2)
-	queue.EnQueue(3)
-	queue.EnQueue(4)
-	queue.EnQueue(5)
-
-	queue.Print()
-	assert.Equal([]int{1, 2, 3, 4, 5}, queue.Data())
-
-	queue.DeQueue()
-	queue.DeQueue()
-	queue.EnQueue(6)
-	queue.EnQueue(7)
-
-	queue.Print()
-	assert.Equal([]int{3, 4, 5, 6, 7}, queue.Data())
-
-}
--- a/datastructure/queue/linkedqueue.go
+++ b/datastructure/queue/linkedqueue.go
@@ -1,104 +0,0 @@
-package datastructure
-
-import (
-	"errors"
-	"fmt"
-
-	"github.com/duke-git/lancet/v2/datastructure"
-)
-
-// LinkedQueue implements queue with link list
-type LinkedQueue[T any] struct {
-	head   *datastructure.QueueNode[T]
-	tail   *datastructure.QueueNode[T]
-	length int
-}
-
-// NewLinkedQueue return a empty LinkedQueue pointer
-func NewLinkedQueue[T any]() *LinkedQueue[T] {
-	return &LinkedQueue[T]{head: nil, tail: nil, length: 0}
-}
-
-// Data return queue data
-func (q *LinkedQueue[T]) Data() []T {
-	res := []T{}
-	current := q.head
-
-	for current != nil {
-		res = append(res, current.Value)
-		current = current.Next
-	}
-	return res
-}
-
-// Size return length of queue data
-func (q *LinkedQueue[T]) Size() int {
-	return q.length
-}
-
-// IsEmpty checks if queue is empty or not
-func (q *LinkedQueue[T]) IsEmpty() bool {
-	return q.length == 0
-}
-
-// EnQueue add element into queue
-func (q *LinkedQueue[T]) EnQueue(value T) {
-	newNode := datastructure.NewQueueNode(value)
-
-	if q.IsEmpty() {
-		q.head = newNode
-		q.tail = newNode
-	} else {
-		q.tail.Next = newNode
-		q.tail = newNode
-	}
-	q.length++
-}
-
-// DeQueue delete head element of queue then return it, if queue is empty, return nil and error
-func (q *LinkedQueue[T]) DeQueue() (*T, error) {
-	if q.IsEmpty() {
-		return nil, errors.New("queue is empty")
-	}
-
-	head := q.head
-	q.head = q.head.Next
-	q.length--
-
-	return &head.Value, nil
-}
-
-// Front return front value of queue
-func (q *LinkedQueue[T]) Front() (*T, error) {
-	if q.IsEmpty() {
-		return nil, errors.New("queue is empty")
-	}
-	return &q.head.Value, nil
-}
-
-// Back return back value of queue
-func (q *LinkedQueue[T]) Back() (*T, error) {
-	if q.IsEmpty() {
-		return nil, errors.New("queue is empty")
-	}
-	return &q.tail.Value, nil
-}
-
-// Clear clear the queue data
-func (q *LinkedQueue[T]) Clear() {
-	q.head = nil
-	q.tail = nil
-	q.length = 0
-}
-
-// Print all nodes info of queue link
-func (q *LinkedQueue[T]) Print() {
-	current := q.head
-	info := "[ "
-	for current != nil {
-		info += fmt.Sprintf("%+v, ", current)
-		current = current.Next
-	}
-	info += " ]"
-	fmt.Println(info)
-}
--- a/datastructure/queue/linkedqueue_test.go
+++ b/datastructure/queue/linkedqueue_test.go
@@ -1,84 +0,0 @@
-package datastructure
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-func TestLinkedQueue_EnQueue(t *testing.T) {
-	assert := internal.NewAssert(t, "TestLinkedQueue_EnQueue")
-
-	queue := NewLinkedQueue[int]()
-	queue.EnQueue(1)
-	queue.EnQueue(2)
-	queue.EnQueue(3)
-
-	queue.Print()
-
-	assert.Equal([]int{1, 2, 3}, queue.Data())
-	assert.Equal(3, queue.Size())
-}
-
-func TestLinkedQueue_DeQueue(t *testing.T) {
-	assert := internal.NewAssert(t, "TestLinkedQueue_DeQueue")
-
-	queue := NewLinkedQueue[int]()
-	queue.EnQueue(1)
-	queue.EnQueue(2)
-	queue.EnQueue(3)
-
-	val, _ := queue.DeQueue()
-
-	queue.Print()
-
-	assert.Equal([]int{2, 3}, queue.Data())
-	assert.Equal(1, *val)
-}
-
-func TestLinkedQueue_Front(t *testing.T) {
-	assert := internal.NewAssert(t, "TestLinkedQueue_Front")
-
-	queue := NewLinkedQueue[int]()
-	val, err := queue.Front()
-	assert.IsNotNil(err)
-
-	queue.EnQueue(1)
-	queue.EnQueue(2)
-	queue.EnQueue(3)
-
-	val, err = queue.Front()
-	assert.Equal(1, *val)
-	assert.IsNil(err)
-}
-
-func TestLinkedQueue_Back(t *testing.T) {
-	assert := internal.NewAssert(t, "TestLinkedQueue_Back")
-
-	queue := NewLinkedQueue[int]()
-	val, err := queue.Back()
-	assert.IsNotNil(err)
-
-	queue.EnQueue(1)
-	queue.EnQueue(2)
-	queue.EnQueue(3)
-
-	val, err = queue.Back()
-	assert.Equal(3, *val)
-	assert.IsNil(err)
-}
-
-func TestLinkedQueue_Clear(t *testing.T) {
-	assert := internal.NewAssert(t, "TestLinkedQueue_Back")
-
-	queue := NewLinkedQueue[int]()
-	assert.Equal(true, queue.IsEmpty())
-
-	queue.EnQueue(1)
-	queue.EnQueue(2)
-	queue.EnQueue(3)
-	assert.Equal(false, queue.IsEmpty())
-
-	queue.Clear()
-	assert.Equal(true, queue.IsEmpty())
-}
--- a/datastructure/set/set.go
+++ b/datastructure/set/set.go
@@ -1,105 +0,0 @@
-package datastructure
-
-// Set is a data container, like slice, but element of set is not duplicate
-type Set[T comparable] map[T]bool
-
-// NewSet return a instance of set
-func NewSet[T comparable](values ...T) Set[T] {
-	set := make(Set[T])
-	set.Add(values...)
-	return set
-}
-
-// Add value to set
-func (s Set[T]) Add(values ...T) {
-	for _, v := range values {
-		s[v] = true
-	}
-}
-
-// Contain checks if set contains value or not
-func (s Set[T]) Contain(value T) bool {
-	_, ok := s[value]
-	return ok
-}
-
-// Contain checks if set contains other set
-func (s Set[T]) ContainAll(other Set[T]) bool {
-	for k := range other {
-		_, ok := s[k]
-		if !ok {
-			return false
-		}
-	}
-	return true
-}
-
-// Clone return a copy of set
-func (s Set[T]) Clone() Set[T] {
-	set := NewSet[T]()
-	set.Add(s.Values()...)
-	return set
-}
-
-// Delete value of set
-func (s Set[T]) Delete(values ...T) {
-	for _, v := range values {
-		delete(s, v)
-	}
-}
-
-// Equal checks if two set has same elements or not
-func (s Set[T]) Equal(other Set[T]) bool {
-	if s.Size() != other.Size() {
-		return false
-	}
-
-	return s.ContainAll(other) && other.ContainAll(s)
-}
-
-// Iterate call function by every element of set
-func (s Set[T]) Iterate(fn func(value T)) {
-	for v := range s {
-		fn(v)
-	}
-}
-
-// IsEmpty checks the set is empty or not
-func (s Set[T]) IsEmpty() bool {
-	return len(s) == 0
-}
-
-// Size get the number of elements in set
-func (s Set[T]) Size() int {
-	return len(s)
-}
-
-// Values return all values of set
-func (s Set[T]) Values() []T {
-	values := make([]T, 0, 0)
-
-	s.Iterate(func(value T) {
-		values = append(values, value)
-	})
-
-	return values
-}
-
-// Union creates a new set contain all element of set s and other
-func (s Set[T]) Union(other Set[T]) Set[T] {
-	set := s.Clone()
-	set.Add(other.Values()...)
-	return set
-}
-
-// Intersection creates a new set whose element both be contained in set s and other
-func (s Set[T]) Intersection(other Set[T]) Set[T] {
-	set := NewSet[T]()
-	s.Iterate(func(value T) {
-		if other.Contain(value) {
-			set.Add(value)
-		}
-	})
-
-	return set
-}
--- a/datastructure/set/set_test.go
+++ b/datastructure/set/set_test.go
@@ -1,129 +0,0 @@
-package datastructure
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-func TestSet_Add(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSet_Add")
-
-	set := NewSet[int]()
-	set.Add(1, 2, 3)
-
-	expected := NewSet(1, 2, 3)
-
-	assert.Equal(true, set.Equal(expected))
-}
-
-func TestSet_Contain(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSet_Contain")
-
-	set := NewSet[int]()
-	set.Add(1, 2, 3)
-
-	assert.Equal(true, set.Contain(1))
-	assert.Equal(false, set.Contain(4))
-}
-
-func TestSet_ContainAll(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSet_ContainAll")
-
-	set1 := NewSet(1, 2, 3)
-	set2 := NewSet(1, 2)
-	set3 := NewSet(1, 2, 3, 4)
-
-	assert.Equal(true, set1.ContainAll(set2))
-	assert.Equal(false, set1.ContainAll(set3))
-}
-
-func TestSet_Clone(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSet_Clone")
-
-	set1 := NewSet(1, 2, 3)
-	set2 := set1.Clone()
-
-	assert.Equal(true, set1.Size() == set2.Size())
-	assert.Equal(true, set1.ContainAll(set2))
-}
-
-func TestSet_Delete(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSet_Delete")
-
-	set := NewSet[int]()
-	set.Add(1, 2, 3)
-	set.Delete(3)
-
-	expected := NewSet(1, 2)
-
-	assert.Equal(true, set.Equal(expected))
-}
-
-func TestSet_Equal(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSet_Equal")
-
-	set1 := NewSet(1, 2, 3)
-	set2 := NewSet(1, 2, 3)
-	set3 := NewSet(1, 2, 3, 4)
-
-	assert.Equal(true, set1.Equal(set2))
-	assert.Equal(false, set1.Equal(set3))
-}
-
-func TestSet_Iterate(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSet_Iterate")
-
-	set := NewSet(1, 2, 3)
-	arr := []int{}
-	set.Iterate(func(value int) {
-		arr = append(arr, value)
-	})
-
-	assert.Equal(3, len(arr))
-}
-
-func TestSet_IsEmpty(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSet_IsEmpty")
-
-	set := NewSet[int]()
-	assert.Equal(true, set.IsEmpty())
-}
-
-func TestSet_Size(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSet_Size")
-
-	set := NewSet(1, 2, 3)
-	assert.Equal(3, set.Size())
-}
-
-func TestSet_Values(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSet_Values")
-
-	set := NewSet(1, 2, 3)
-	values := set.Values()
-
-	assert.Equal(3, len(values))
-}
-
-func TestSet_Union(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSet_Union")
-
-	set1 := NewSet(1, 2, 3)
-	set2 := NewSet(2, 3, 4, 5)
-	expected := NewSet(1, 2, 3, 4, 5)
-	unionSet := set1.Union(set2)
-
-	assert.Equal(expected, unionSet)
-}
-
-func TestSet_Intersection(t *testing.T) {
-	assert := internal.NewAssert(t, "TestSet_Intersection")
-
-	set1 := NewSet(1, 2, 3)
-	set2 := NewSet(2, 3, 4, 5)
-	expected := NewSet(2, 3)
-	intersectionSet := set1.Intersection(set2)
-
-	assert.Equal(expected, intersectionSet)
-}
--- a/datastructure/stack/arraystack.go
+++ b/datastructure/stack/arraystack.go
@@ -1,62 +0,0 @@
-package datastructure
-
-import "errors"
-
-// ArrayStack implements stack with slice
-type ArrayStack[T any] struct {
-	data   []T
-	length int
-}
-
-// NewArrayStack return a empty ArrayStack pointer
-func NewArrayStack[T any]() *ArrayStack[T] {
-	return &ArrayStack[T]{data: []T{}, length: 0}
-}
-
-// Data return stack data
-func (s *ArrayStack[T]) Data() []T {
-	return s.data
-}
-
-// Size return length of stack data
-func (s *ArrayStack[T]) Size() int {
-	return s.length
-}
-
-// IsEmpty checks if stack is empty or not
-func (s *ArrayStack[T]) IsEmpty() bool {
-	return s.length == 0
-}
-
-// Push element into stack
-func (s *ArrayStack[T]) Push(value T) {
-	s.data = append([]T{value}, s.data...)
-	s.length++
-}
-
-// Pop delete the top element of stack then return it, if stack is empty, return nil and error
-func (s *ArrayStack[T]) Pop() (*T, error) {
-	if s.IsEmpty() {
-		return nil, errors.New("stack is empty")
-	}
-
-	topItem := s.data[0]
-	s.data = s.data[1:]
-	s.length--
-
-	return &topItem, nil
-}
-
-// Peak return the top element of stack then return it
-func (s *ArrayStack[T]) Peak() (*T, error) {
-	if s.IsEmpty() {
-		return nil, errors.New("stack is empty")
-	}
-	return &s.data[0], nil
-}
-
-// Clear the stack data
-func (s *ArrayStack[T]) Clear() {
-	s.data = []T{}
-	s.length = 0
-}
--- a/datastructure/stack/arraystack_test.go
+++ b/datastructure/stack/arraystack_test.go
@@ -1,77 +0,0 @@
-package datastructure
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-func TestArrayStack_Push(t *testing.T) {
-	assert := internal.NewAssert(t, "TestArrayStack_Push")
-
-	stack := NewArrayStack[int]()
-	stack.Push(1)
-	stack.Push(2)
-	stack.Push(3)
-
-	expected := []int{3, 2, 1}
-	values := stack.Data()
-	length := stack.Size()
-
-	assert.Equal(expected, values)
-	assert.Equal(3, length)
-}
-
-func TestArrayStack_Pop(t *testing.T) {
-	assert := internal.NewAssert(t, "TestArrayStack_Pop")
-
-	stack := NewArrayStack[int]()
-	topItem, err := stack.Pop()
-	assert.IsNotNil(err)
-
-	stack.Push(1)
-	stack.Push(2)
-	stack.Push(3)
-
-	topItem, err = stack.Pop()
-	assert.IsNil(err)
-	assert.Equal(3, *topItem)
-
-	expected := []int{2, 1}
-	assert.Equal(expected, stack.Data())
-}
-
-func TestArrayStack_Peak(t *testing.T) {
-	assert := internal.NewAssert(t, "TestArrayStack_Peak")
-
-	stack := NewArrayStack[int]()
-	topItem, err := stack.Peak()
-	assert.IsNotNil(err)
-
-	stack.Push(1)
-	stack.Push(2)
-	stack.Push(3)
-
-	topItem, err = stack.Peak()
-	assert.IsNil(err)
-	assert.Equal(3, *topItem)
-
-	expected := []int{3, 2, 1}
-	assert.Equal(expected, stack.Data())
-}
-
-func TestArrayStack_Clear(t *testing.T) {
-	assert := internal.NewAssert(t, "TestArrayStack_Clear")
-
-	stack := NewArrayStack[int]()
-	assert.Equal(true, stack.IsEmpty())
-	assert.Equal(0, stack.Size())
-
-	stack.Push(1)
-	assert.Equal(false, stack.IsEmpty())
-	assert.Equal(1, stack.Size())
-
-	stack.Clear()
-	assert.Equal(true, stack.IsEmpty())
-	assert.Equal(0, stack.Size())
-}
--- a/datastructure/stack/linkedstack.go
+++ b/datastructure/stack/linkedstack.go
@@ -1,94 +0,0 @@
-package datastructure
-
-import (
-	"errors"
-	"fmt"
-
-	"github.com/duke-git/lancet/v2/datastructure"
-)
-
-// LinkedStack implements stack with link list
-type LinkedStack[T any] struct {
-	top    *datastructure.StackNode[T]
-	length int
-}
-
-// NewLinkedStack return a empty LinkedStack pointer
-func NewLinkedStack[T any]() *LinkedStack[T] {
-	return &LinkedStack[T]{top: nil, length: 0}
-}
-
-// Data return stack data
-func (s *LinkedStack[T]) Data() []T {
-	res := []T{}
-	current := s.top
-
-	for current != nil {
-		res = append(res, current.Value)
-		current = current.Next
-	}
-	return res
-}
-
-// Size return length of stack data
-func (s *LinkedStack[T]) Size() int {
-	return s.length
-}
-
-// IsEmpty checks if stack is empty or not
-func (s *LinkedStack[T]) IsEmpty() bool {
-	return s.length == 0
-}
-
-// Push element into stack
-func (s *LinkedStack[T]) Push(value T) {
-	newNode := datastructure.NewStackNode(value)
-	top := s.top
-	if top == nil {
-		s.top = newNode
-	} else {
-		newNode.Next = top
-		s.top = newNode
-	}
-
-	s.length++
-}
-
-// Pop delete the top element of stack then return it, if stack is empty, return nil and error
-func (s *LinkedStack[T]) Pop() (*T, error) {
-	if s.IsEmpty() {
-		return nil, errors.New("stack is empty")
-	}
-
-	top := s.top
-	s.top = s.top.Next
-	s.length--
-
-	return &top.Value, nil
-}
-
-// Peak return the top element of stack then return it
-func (s *LinkedStack[T]) Peak() (*T, error) {
-	if s.IsEmpty() {
-		return nil, errors.New("stack is empty")
-	}
-	return &s.top.Value, nil
-}
-
-// Clear clear the stack data
-func (s *LinkedStack[T]) Clear() {
-	s.top = nil
-	s.length = 0
-}
-
-// Print all nodes info of stack link
-func (s *LinkedStack[T]) Print() {
-	current := s.top
-	info := "[ "
-	for current != nil {
-		info += fmt.Sprintf("%+v, ", current)
-		current = current.Next
-	}
-	info += " ]"
-	fmt.Println(info)
-}
--- a/datastructure/stack/linkedstack_test.go
+++ b/datastructure/stack/linkedstack_test.go
@@ -1,80 +0,0 @@
-package datastructure
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-func TestLinkedStack_Push(t *testing.T) {
-	assert := internal.NewAssert(t, "TestLinkedStack_Push")
-
-	stack := NewLinkedStack[int]()
-	stack.Push(1)
-	stack.Push(2)
-	stack.Push(3)
-
-	stack.Print()
-
-	expected := []int{3, 2, 1}
-	values := stack.Data()
-	size := stack.Size()
-
-	assert.Equal(expected, values)
-	assert.Equal(3, size)
-}
-
-func TestLinkedStack_Pop(t *testing.T) {
-	assert := internal.NewAssert(t, "TestLinkedStack_Pop")
-
-	stack := NewLinkedStack[int]()
-	topItem, err := stack.Pop()
-	assert.IsNotNil(err)
-
-	stack.Push(1)
-	stack.Push(2)
-	stack.Push(3)
-
-	topItem, err = stack.Pop()
-	assert.IsNil(err)
-	assert.Equal(3, *topItem)
-
-	expected := []int{2, 1}
-	stack.Print()
-	assert.Equal(expected, stack.Data())
-}
-
-func TestLinkedStack_Peak(t *testing.T) {
-	assert := internal.NewAssert(t, "TestLinkedStack_Peak")
-
-	stack := NewLinkedStack[int]()
-	topItem, err := stack.Peak()
-	assert.IsNotNil(err)
-
-	stack.Push(1)
-	stack.Push(2)
-	stack.Push(3)
-
-	topItem, err = stack.Peak()
-	assert.IsNil(err)
-	assert.Equal(3, *topItem)
-
-	expected := []int{3, 2, 1}
-	assert.Equal(expected, stack.Data())
-}
-
-func TestLinkedStack_Empty(t *testing.T) {
-	assert := internal.NewAssert(t, "TestLinkedStack_Empty")
-
-	stack := NewLinkedStack[int]()
-	assert.Equal(true, stack.IsEmpty())
-	assert.Equal(0, stack.Size())
-
-	stack.Push(1)
-	assert.Equal(false, stack.IsEmpty())
-	assert.Equal(1, stack.Size())
-
-	stack.Clear()
-	assert.Equal(true, stack.IsEmpty())
-	assert.Equal(0, stack.Size())
-}
--- a/datastructure/tree/bstree.go
+++ b/datastructure/tree/bstree.go
@@ -1,83 +0,0 @@
-package datastructure
-
-import (
-	"math"
-
-	"github.com/duke-git/lancet/v2/datastructure"
-	"github.com/duke-git/lancet/v2/lancetconstraints"
-)
-
-// BSTree is a binary search tree data structure in which each node has at most two children,
-// which are referred to as the left child and the right child.
-// In BSTree: leftNode < rootNode < rightNode
-// type T should implements Compare function in lancetconstraints.Comparator interface.
-type BSTree[T any] struct {
-	root *datastructure.TreeNode[T]
-}
-
-// NewBSTree create a BSTree pointer
-func NewBSTree[T any](rootData T) *BSTree[T] {
-	root := datastructure.NewTreeNode(rootData)
-	return &BSTree[T]{root}
-}
-
-// InsertNode insert data into BSTree
-func (t *BSTree[T]) InsertNode(data T, comparator lancetconstraints.Comparator) {
-	root := t.root
-	newNode := datastructure.NewTreeNode(data)
-	if root == nil {
-		t.root = newNode
-	} else {
-		insertTreeNode(root, newNode, comparator)
-	}
-}
-
-// DeletetNode delete data into BSTree
-func (t *BSTree[T]) DeletetNode(data T, comparator lancetconstraints.Comparator) {
-	deleteTreeNode(t.root, data, comparator)
-}
-
-// NodeLevel get node level in BSTree
-func (t *BSTree[T]) NodeLevel(node *datastructure.TreeNode[T]) int {
-	if node == nil {
-		return 0
-	}
-	left := float64(t.NodeLevel(node.Left))
-	right := float64(t.NodeLevel(node.Right))
-
-	return int(math.Max(left, right)) + 1
-}
-
-// PreOrderTraverse traverse tree node in pre order
-func (t *BSTree[T]) PreOrderTraverse() []T {
-	return preOrderTraverse(t.root)
-}
-
-// PostOrderTraverse traverse tree node in post order
-func (t *BSTree[T]) PostOrderTraverse() []T {
-	return postOrderTraverse(t.root)
-}
-
-// InOrderTraverse traverse tree node in mid order
-func (t *BSTree[T]) InOrderTraverse() []T {
-	return inOrderTraverse(t.root)
-}
-
-// LevelOrderTraverse traverse tree node in level order
-func (t *BSTree[T]) LevelOrderTraverse() []T {
-	traversal := make([]T, 0)
-	levelOrderTraverse(t.root, &traversal)
-	return traversal
-}
-
-// Depth returns the calculated depth of a binary saerch tree
-func (t *BSTree[T]) Depth() int {
-	return calculateDepth(t.root, 0)
-}
-
-// Print the bstree structure
-func (t *BSTree[T]) Print() {
-	maxLevel := t.NodeLevel(t.root)
-	nodes := []*datastructure.TreeNode[T]{t.root}
-	printTreeNodes(nodes, 1, maxLevel)
-}
--- a/datastructure/tree/bstree_test.go
+++ b/datastructure/tree/bstree_test.go
@@ -1,142 +0,0 @@
-package datastructure
-
-import (
-	"testing"
-
-	"github.com/duke-git/lancet/v2/internal"
-)
-
-type intComparator struct{}
-
-func (c *intComparator) Compare(v1, v2 any) int {
-	val1, _ := v1.(int)
-	val2, _ := v2.(int)
-
-	if val1 < val2 {
-		return -1
-	} else if val1 > val2 {
-		return 1
-	}
-	return 0
-}
-
-func TestBSTree_InsertNode(t *testing.T) {
-	bstree := NewBSTree(6)
-
-	comparator := &intComparator{}
-	bstree.InsertNode(7, comparator)
-	bstree.InsertNode(5, comparator)
-	bstree.InsertNode(2, comparator)
-	bstree.InsertNode(4, comparator)
-
-	bstree.Print()
-}
-
-func TestBSTree_PreOrderTraverse(t *testing.T) {
-	assert := internal.NewAssert(t, "TestBSTree_PreOrderTraverse")
-
-	bstree := NewBSTree(6)
-
-	comparator := &intComparator{}
-	bstree.InsertNode(7, comparator)
-	bstree.InsertNode(5, comparator)
-	bstree.InsertNode(2, comparator)
-	bstree.InsertNode(4, comparator)
-
-	acturl := bstree.PreOrderTraverse()
-	t.Log(acturl)
-	assert.Equal([]int{6, 5, 2, 4, 7}, acturl)
-}
-
-func TestBSTree_PostOrderTraverse(t *testing.T) {
-	assert := internal.NewAssert(t, "TestBSTree_PostOrderTraverse")
-
-	bstree := NewBSTree(6)
-
-	comparator := &intComparator{}
-	bstree.InsertNode(7, comparator)
-	bstree.InsertNode(5, comparator)
-	bstree.InsertNode(2, comparator)
-	bstree.InsertNode(4, comparator)
-
-	acturl := bstree.PostOrderTraverse()
-	t.Log(acturl)
-	assert.Equal([]int{5, 2, 4, 7, 6}, acturl)
-}
-
-func TestBSTree_InOrderTraverse(t *testing.T) {
-	assert := internal.NewAssert(t, "TestBSTree_InOrderTraverse")
-
-	bstree := NewBSTree(6)
-
-	comparator := &intComparator{}
-	bstree.InsertNode(7, comparator)
-	bstree.InsertNode(5, comparator)
-	bstree.InsertNode(2, comparator)
-	bstree.InsertNode(4, comparator)
-
-	acturl := bstree.InOrderTraverse()
-	t.Log(acturl)
-	assert.Equal([]int{2, 4, 5, 6, 7}, acturl)
-}
-
-func TestBSTree_LevelOrderTraverse(t *testing.T) {
-	assert := internal.NewAssert(t, "TestBSTree_LevelOrderTraverse")
-
-	bstree := NewBSTree(6)
-
-	comparator := &intComparator{}
-	bstree.InsertNode(7, comparator)
-	bstree.InsertNode(5, comparator)
-	bstree.InsertNode(2, comparator)
-	bstree.InsertNode(4, comparator)
-
-	bstree.Print()
-
-	acturl := bstree.LevelOrderTraverse()
-	t.Log(acturl)
-	assert.Equal([]int{6, 5, 7, 2, 4}, acturl)
-}
-
-func TestBSTree_DeletetNode(t *testing.T) {
-	assert := internal.NewAssert(t, "TestBSTree_DeletetNode")
-
-	bstree := NewBSTree(6)
-
-	comparator := &intComparator{}
-	bstree.InsertNode(7, comparator)
-	bstree.InsertNode(5, comparator)
-	bstree.InsertNode(2, comparator)
-	bstree.InsertNode(4, comparator)
-
-	bstree.Print()
-
-	bstree.DeletetNode(4, comparator)
-	bstree.Print()
-	acturl1 := bstree.InOrderTraverse()
-	t.Log(acturl1)
-	assert.Equal([]int{2, 5, 6, 7}, acturl1)
-
-	//todo
-	// bstree.DeletetNode(6, comparator)
-	// bstree.Print()
-	// acturl2 := bstree.InOrderTraverse()
-	// t.Log(acturl2)
-	// assert.Equal([]int{2, 5, 7}, acturl2)
-}
-
-func TestBSTree_Depth(t *testing.T) {
-	assert := internal.NewAssert(t, "TestBSTree_Depth")
-
-	bstree := NewBSTree(6)
-
-	comparator := &intComparator{}
-	bstree.InsertNode(7, comparator)
-	bstree.InsertNode(5, comparator)
-	bstree.InsertNode(2, comparator)
-	bstree.InsertNode(4, comparator)
-
-	bstree.Print()
-
-	assert.Equal(bstree.Depth(), 4)
-}
--- a/datastructure/tree/tree_internal.go
+++ b/datastructure/tree/tree_internal.go
@@ -1,224 +0,0 @@
-package datastructure
-
-import (
-	"fmt"
-	"math"
-
-	"github.com/duke-git/lancet/v2/datastructure"
-	"github.com/duke-git/lancet/v2/lancetconstraints"
-)
-
-func preOrderTraverse[T any](node *datastructure.TreeNode[T]) []T {
-	data := []T{}
-	if node != nil {
-		data = append(data, node.Data)
-		data = append(data, preOrderTraverse(node.Left)...)
-		data = append(data, preOrderTraverse(node.Right)...)
-	}
-	return data
-}
-
-func postOrderTraverse[T any](node *datastructure.TreeNode[T]) []T {
-	data := []T{}
-	if node != nil {
-		data = append(data, preOrderTraverse(node.Left)...)
-		data = append(data, preOrderTraverse(node.Right)...)
-		data = append(data, node.Data)
-	}
-	return data
-}
-
-func inOrderTraverse[T any](node *datastructure.TreeNode[T]) []T {
-	data := []T{}
-	if node != nil {
-		data = append(data, inOrderTraverse(node.Left)...)
-		data = append(data, node.Data)
-		data = append(data, inOrderTraverse(node.Right)...)
-	}
-	return data
-}
-
-func preOrderPrint[T any](node *datastructure.TreeNode[T]) {
-	if node == nil {
-		return
-	}
-
-	fmt.Printf("%v, ", node.Data)
-	preOrderPrint(node.Left)
-	preOrderPrint(node.Right)
-}
-
-func postOrderPrint[T any](node *datastructure.TreeNode[T]) {
-	if node == nil {
-		return
-	}
-
-	preOrderPrint(node.Left)
-	preOrderPrint(node.Right)
-	fmt.Printf("%v, ", node.Data)
-}
-
-func inOrderPrint[T any](node *datastructure.TreeNode[T]) {
-	if node == nil {
-		return
-	}
-
-	inOrderPrint(node.Left)
-	fmt.Printf("%v, ", node.Data)
-	inOrderPrint(node.Right)
-}
-
-func levelOrderTraverse[T any](root *datastructure.TreeNode[T], traversal *[]T) {
-	var q []*datastructure.TreeNode[T] // queue
-	var n *datastructure.TreeNode[T]   // temp node
-
-	q = append(q, root)
-
-	for len(q) != 0 {
-		n, q = q[0], q[1:]
-		*traversal = append(*traversal, n.Data)
-		if n.Left != nil {
-			q = append(q, n.Left)
-		}
-		if n.Right != nil {
-			q = append(q, n.Right)
-		}
-	}
-}
-
-func insertTreeNode[T any](rootNode, newNode *datastructure.TreeNode[T], comparator lancetconstraints.Comparator) {
-	if comparator.Compare(newNode.Data, rootNode.Data) == -1 {
-		if rootNode.Left == nil {
-			rootNode.Left = newNode
-		} else {
-			insertTreeNode(rootNode.Left, newNode, comparator)
-		}
-	} else {
-		if rootNode.Right == nil {
-			rootNode.Right = newNode
-		} else {
-			insertTreeNode(rootNode.Right, newNode, comparator)
-		}
-	}
-}
-
-// todo, delete root node failed
-func deleteTreeNode[T any](node *datastructure.TreeNode[T], data T, comparator lancetconstraints.Comparator) *datastructure.TreeNode[T] {
-	if node == nil {
-		return nil
-	}
-	if comparator.Compare(data, node.Data) == -1 {
-		node.Left = deleteTreeNode(node.Left, data, comparator)
-	} else if comparator.Compare(data, node.Data) == 1 {
-		node.Right = deleteTreeNode(node.Right, data, comparator)
-	} else {
-		if node.Left == nil {
-			node = node.Right
-		} else if node.Right == nil {
-			node = node.Left
-		} else {
-			l := node.Right
-			d := inOrderSuccessor(l)
-			d.Left = node.Left
-			return node.Right
-		}
-	}
-
-	return node
-}
-
-func inOrderSuccessor[T any](root *datastructure.TreeNode[T]) *datastructure.TreeNode[T] {
-	cur := root
-	for cur.Left != nil {
-		cur = cur.Left
-	}
-	return cur
-}
-
-func printTreeNodes[T any](nodes []*datastructure.TreeNode[T], level, maxLevel int) {
-	if len(nodes) == 0 || isAllNil(nodes) {
-		return
-	}
-
-	floor := maxLevel - level
-	endgeLines := int(math.Pow(float64(2), (math.Max(float64(floor)-1, 0))))
-	firstSpaces := int(math.Pow(float64(2), float64(floor))) - 1
-	betweenSpaces := int(math.Pow(float64(2), float64(floor)+1)) - 1
-
-	printSpaces(firstSpaces)
-
-	newNodes := []*datastructure.TreeNode[T]{}
-	for _, node := range nodes {
-		if node != nil {
-			fmt.Printf("%v", node.Data)
-			newNodes = append(newNodes, node.Left)
-			newNodes = append(newNodes, node.Right)
-		} else {
-			newNodes = append(newNodes, nil)
-			newNodes = append(newNodes, nil)
-			printSpaces(1)
-		}
-
-		printSpaces(betweenSpaces)
-	}
-
-	fmt.Println("")
-
-	for i := 1; i <= endgeLines; i++ {
-		for j := 0; j < len(nodes); j++ {
-			printSpaces(firstSpaces - i)
-			if nodes[j] == nil {
-				printSpaces(endgeLines + endgeLines + i + 1)
-				continue
-			}
-
-			if nodes[j].Left != nil {
-				fmt.Print("/")
-			} else {
-				printSpaces(1)
-			}
-
-			printSpaces(i + i - 1)
-
-			if nodes[j].Right != nil {
-				fmt.Print("\\")
-			} else {
-				printSpaces(1)
-			}
-			printSpaces(endgeLines + endgeLines - 1)
-		}
-		fmt.Println("")
-	}
-
-	printTreeNodes(newNodes, level+1, maxLevel)
-}
-
-// printSpaces
-func printSpaces(n int) {
-	for i := 0; i < n; i++ {
-		fmt.Print(" ")
-	}
-}
-
-func isAllNil[T any](nodes []*datastructure.TreeNode[T]) bool {
-	for _, v := range nodes {
-		if v != nil {
-			return false
-		}
-	}
-	return true
-}
-
-func calculateDepth[T any](node *datastructure.TreeNode[T], depth int) int {
-	if node == nil {
-		return depth
-	}
-	return max(calculateDepth(node.Left, depth+1), calculateDepth(node.Right, depth+1))
-}
-
-func max(a, b int) int {
-	if a > b {
-		return a
-	}
-	return b
-}
--- a/datetime/conversion.go
+++ b/datetime/conversion.go
@@ -0,0 +1,60 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license.
+
+package datetime
+
+import "time"
+
+type theTime struct {
+	unix int64
+}
+
+// NewUnixNow return unix timestamp of current time
+func NewUnixNow() *theTime {
+	return &theTime{unix: time.Now().Unix()}
+}
+
+// NewUnix return unix timestamp of specified time
+func NewUnix(unix int64) *theTime {
+	return &theTime{unix: unix}
+}
+
+// NewFormat return unix timestamp of specified time string, t should be "yyyy-mm-dd hh:mm:ss"
+func NewFormat(t string) (*theTime, error) {
+	timeLayout := "2006-01-02 15:04:05"
+	loc := time.FixedZone("CST", 8*3600)
+	tt, err := time.ParseInLocation(timeLayout, t, loc)
+	if err != nil {
+		return nil, err
+	}
+	return &theTime{unix: tt.Unix()}, nil
+}
+
+// NewISO8601 return unix timestamp of specified iso8601 time string
+func NewISO8601(iso8601 string) (*theTime, error) {
+	t, err := time.ParseInLocation(time.RFC3339, iso8601, time.UTC)
+	if err != nil {
+		return nil, err
+	}
+	return &theTime{unix: t.Unix()}, nil
+}
+
+// ToUnix return unix timestamp
+func (t *theTime) ToUnix() int64 {
+	return t.unix
+}
+
+// ToFormat return the time string 'yyyy-mm-dd hh:mm:ss' of unix time
+func (t *theTime) ToFormat() string {
+	return time.Unix(t.unix, 0).Format("2006-01-02 15:04:05")
+}
+
+// ToFormatForTpl return the time string which format is specified tpl
+func (t *theTime) ToFormatForTpl(tpl string) string {
+	return time.Unix(t.unix, 0).Format(tpl)
+}
+
+// ToFormatForTpl return iso8601 time string
+func (t *theTime) ToIso8601() string {
+	return time.Unix(t.unix, 0).Format(time.RFC3339)
+}
--- a/datetime/conversion_test.go
+++ b/datetime/conversion_test.go
@@ -0,0 +1,54 @@
+package datetime
+
+import (
+	"testing"
+
+	"github.com/duke-git/lancet/internal"
+)
+
+func TestToUnix(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToUnix")
+
+	tm1 := NewUnixNow()
+	unixTimestamp := tm1.ToUnix()
+	tm2 := NewUnix(unixTimestamp)
+
+	assert.Equal(tm1, tm2)
+}
+
+func TestToFormat(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToFormat")
+
+	tm, err := NewFormat("2022/03/18 17:04:05")
+	assert.IsNotNil(err)
+
+	tm, err = NewFormat("2022-03-18 17:04:05")
+	assert.IsNil(err)
+
+	t.Log("ToFormat -> ", tm.ToFormat())
+}
+
+func TestToFormatForTpl(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToFormatForTpl")
+
+	tm, err := NewFormat("2022/03/18 17:04:05")
+	assert.IsNotNil(err)
+
+	tm, err = NewFormat("2022-03-18 17:04:05")
+	assert.IsNil(err)
+
+	t.Log("ToFormatForTpl -> ", tm.ToFormatForTpl("2006/01/02 15:04:05"))
+
+}
+
+func TestToIso8601(t *testing.T) {
+	assert := internal.NewAssert(t, "TestToIso8601")
+
+	tm, err := NewISO8601("2022-03-18 17:04:05")
+	assert.IsNotNil(err)
+
+	tm, err = NewISO8601("2006-01-02T15:04:05.999Z")
+	assert.IsNil(err)
+
+	t.Log("ToIso8601 -> ", tm.ToIso8601())
+}
--- a/datetime/datetime.go
+++ b/datetime/datetime.go
@@ -3,29 +3,36 @@

 // Package datetime implements some functions to format date and time.
 // Note:
-// 1. `format` param in FormatTimeToStr function should be as flow:
-//"yyyy-mm-dd hh:mm:ss"
-//"yyyy-mm-dd hh:mm"
-//"yyyy-mm-dd hh"
-//"yyyy-mm-dd"
-//"yyyy-mm"
-//"mm-dd"
-//"dd-mm-yy hh:mm:ss"
-//"yyyy/mm/dd hh:mm:ss"
-//"yyyy/mm/dd hh:mm"
-//"yyyy/mm/dd hh"
-//"yyyy/mm/dd"
-//"yyyy/mm"
-//"mm/dd"
-//"dd/mm/yy hh:mm:ss"
-//"yyyy"
-//"mm"
-//"hh:mm:ss"
-//"mm:ss"
+// 1. `format` param in FormatTimeToStr function should be as flow (case no sensitive):
+// "yyyy-mm-dd hh:mm:ss"
+// "yyyy-mm-dd hh:mm"
+// "yyyy-mm-dd hh"
+// "yyyy-mm-dd"
+// "yyyy-mm"
+// "mm-dd"
+// "dd-mm-yy hh:mm:ss"
+// "yyyy/mm/dd hh:mm:ss"
+// "yyyy/mm/dd hh:mm"
+// "yyyy/mm/dd hh"
+// "yyyy/mm/dd"
+// "yyyy/mm"
+// "mm/dd"
+// "dd/mm/yy hh:mm:ss"
+// "yyyymmdd"
+// "mmddyy"
+// "yyyy"
+// "yy"
+// "mm"
+// "hh:mm:ss"
+// "hh:mm"
+// "mm:ss"
+
 package datetime

 import (
 	"fmt"
+	"runtime"
+	"strings"
 	"time"
 )

@@ -35,7 +42,7 @@ func init() {
 	timeFormat = map[string]string{
 		"yyyy-mm-dd hh:mm:ss": "2006-01-02 15:04:05",
 		"yyyy-mm-dd hh:mm":    "2006-01-02 15:04",
-		"yyyy-mm-dd hh":       "2006-01-02 15:04",
+		"yyyy-mm-dd hh":       "2006-01-02 15",
 		"yyyy-mm-dd":          "2006-01-02",
 		"yyyy-mm":             "2006-01",
 		"mm-dd":               "01-02",
@@ -47,9 +54,13 @@ func init() {
 		"yyyy/mm":             "2006/01",
 		"mm/dd":               "01/02",
 		"dd/mm/yy hh:mm:ss":   "02/01/06 15:04:05",
+		"yyyymmdd":            "20060102",
+		"mmddyy":              "010206",
 		"yyyy":                "2006",
+		"yy":                  "06",
 		"mm":                  "01",
 		"hh:mm:ss":            "15:04:05",
+		"hh:mm":               "15:04",
 		"mm:ss":               "04:05",
 	}
 }
@@ -69,6 +80,11 @@ func AddDay(t time.Time, day int64) time.Time {
 	return t.Add(24 * time.Hour * time.Duration(day))
 }

+// AddYear add or sub year to the time.
+func AddYear(t time.Time, year int64) time.Time {
+	return t.Add(365 * 24 * time.Hour * time.Duration(year))
+}
+
 // GetNowDate return format yyyy-mm-dd of current date
 func GetNowDate() string {
 	return time.Now().Format("2006-01-02")
@@ -97,18 +113,39 @@ func GetNightTimestamp() int64 {
 }

 // FormatTimeToStr convert time to string
-func FormatTimeToStr(t time.Time, format string) string {
-	return t.Format(timeFormat[format])
+func FormatTimeToStr(t time.Time, format string, timezone ...string) string {
+	tf, ok := timeFormat[strings.ToLower(format)]
+	if !ok {
+		return ""
+	}
+
+	if timezone != nil && timezone[0] != "" {
+		loc, err := time.LoadLocation(timezone[0])
+		if err != nil {
+			return ""
+		}
+		return t.In(loc).Format(tf)
+	}
+	return t.Format(tf)
 }

 // FormatStrToTime convert string to time
-func FormatStrToTime(str, format string) (time.Time, error) {
-	v, ok := timeFormat[format]
+func FormatStrToTime(str, format string, timezone ...string) (time.Time, error) {
+	tf, ok := timeFormat[strings.ToLower(format)]
 	if !ok {
-		return time.Time{}, fmt.Errorf("format %s not found", format)
+		return time.Time{}, fmt.Errorf("format %s not support", format)
 	}

-	return time.Parse(v, str)
+	if timezone != nil && timezone[0] != "" {
+		loc, err := time.LoadLocation(timezone[0])
+		if err != nil {
+			return time.Time{}, err
+		}
+
+		return time.ParseInLocation(tf, str, loc)
+	}
+
+	return time.Parse(tf, str)
 }

 // BeginOfMinute return beginning minute time of day
@@ -180,3 +217,166 @@ func BeginOfYear(t time.Time) time.Time {
 func EndOfYear(t time.Time) time.Time {
 	return BeginOfYear(t).AddDate(1, 0, 0).Add(-time.Nanosecond)
 }
+
+// IsLeapYear check if param year is leap year or not.
+func IsLeapYear(year int) bool {
+	return year%4 == 0 && (year%100 != 0 || year%400 == 0)
+}
+
+// BetweenSeconds returns the number of seconds between two times.
+func BetweenSeconds(t1 time.Time, t2 time.Time) int64 {
+	index := t2.Unix() - t1.Unix()
+	return index
+}
+
+// DayOfYear returns which day of the year the parameter date `t` is.
+func DayOfYear(t time.Time) int {
+	y, m, d := t.Date()
+	firstDay := time.Date(y, 1, 1, 0, 0, 0, 0, t.Location())
+	nowDate := time.Date(y, m, d, 0, 0, 0, 0, t.Location())
+
+	return int(nowDate.Sub(firstDay).Hours() / 24)
+}
+
+// IsWeekend checks if passed time is weekend or not.
+func IsWeekend(t time.Time) bool {
+	return time.Saturday == t.Weekday() || time.Sunday == t.Weekday()
+}
+
+// NowDateOrTime return current datetime with specific format and timezone.
+func NowDateOrTime(format string, timezone ...string) string {
+	tf, ok := timeFormat[strings.ToLower(format)]
+	if !ok {
+		return ""
+	}
+
+	if timezone != nil && timezone[0] != "" {
+		loc, err := time.LoadLocation(timezone[0])
+		if err != nil {
+			return ""
+		}
+
+		return time.Now().In(loc).Format(tf)
+	}
+
+	return time.Now().Format(tf)
+}
+
+// Timestamp return current second timestamp.
+func Timestamp(timezone ...string) int64 {
+	t := time.Now()
+
+	if timezone != nil && timezone[0] != "" {
+		loc, err := time.LoadLocation(timezone[0])
+		if err != nil {
+			return 0
+		}
+
+		t = t.In(loc)
+	}
+
+	return t.Unix()
+}
+
+// TimestampMilli return current mill second timestamp.
+func TimestampMilli(timezone ...string) int64 {
+	t := time.Now()
+
+	if timezone != nil && timezone[0] != "" {
+		loc, err := time.LoadLocation(timezone[0])
+		if err != nil {
+			return 0
+		}
+		t = t.In(loc)
+	}
+
+	return int64(time.Nanosecond) * t.UnixNano() / int64(time.Millisecond)
+}
+
+// TimestampMicro return current micro second timestamp.
+func TimestampMicro(timezone ...string) int64 {
+	t := time.Now()
+
+	if timezone != nil && timezone[0] != "" {
+		loc, err := time.LoadLocation(timezone[0])
+		if err != nil {
+			return 0
+		}
+		t = t.In(loc)
+	}
+
+	return int64(time.Nanosecond) * t.UnixNano() / int64(time.Microsecond)
+}
+
+// TimestampNano return current nano second timestamp.
+func TimestampNano(timezone ...string) int64 {
+	t := time.Now()
+
+	if timezone != nil && timezone[0] != "" {
+		loc, err := time.LoadLocation(timezone[0])
+		if err != nil {
+			return 0
+		}
+		t = t.In(loc)
+	}
+
+	return t.UnixNano()
+}
+
+// TrackFuncTime track the time of function execution.
+// call it at top of the func like `defer TrackFuncTime(time.Now())()`
+func TrackFuncTime(pre time.Time) func() {
+	callerName := getCallerName()
+	return func() {
+		elapsed := time.Since(pre)
+		fmt.Printf("Function %s execution time:\t %v", callerName, elapsed)
+	}
+}
+
+func getCallerName() string {
+	pc, _, _, ok := runtime.Caller(2)
+	if !ok {
+		return "Unknown"
+	}
+	fn := runtime.FuncForPC(pc)
+	if fn == nil {
+		return "Unknown"
+	}
+
+	fullName := fn.Name()
+	if lastDot := strings.LastIndex(fullName, "."); lastDot != -1 {
+		return fullName[lastDot+1:]
+	}
+
+	return fullName
+}
+
+// DaysBetween returns the number of days between two times.
+func DaysBetween(start, end time.Time) int {
+	duration := end.Sub(start)
+	days := int(duration.Hours() / 24)
+
+	return days
+}
+
+// GenerateDatetimesBetween returns a slice of strings between two times.
+// layout: the format of the datetime string
+// interval: the interval between two datetimes
+func GenerateDatetimesBetween(start, end time.Time, layout string, interval string) ([]string, error) {
+	var result []string
+
+	if start.After(end) {
+		start, end = end, start
+	}
+
+	duration, err := time.ParseDuration(interval)
+	if err != nil {
+		return nil, err
+	}
+
+	for current := start; !current.After(end); current = current.Add(duration) {
+		result = append(result, current.Format(layout))
+	}
+
+	return result, nil
+}
--- a/datetime/datetime_test.go
+++ b/datetime/datetime_test.go
@@ -4,7 +4,7 @@ import (
 	"testing"
 	"time"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestAddDay(t *testing.T) {
@@ -46,6 +46,19 @@ func TestAddMinute(t *testing.T) {
 	assert.Equal(float64(-2), diff2.Minutes())
 }

+func TestAddYear(t *testing.T) {
+	assert := internal.NewAssert(t, "TestAddDay")
+
+	now := time.Now()
+	after2Years := AddYear(now, 1)
+	diff1 := after2Years.Sub(now)
+	assert.Equal(float64(8760), diff1.Hours())
+
+	before2Years := AddYear(now, -1)
+	diff2 := before2Years.Sub(now)
+	assert.Equal(float64(-8760), diff2.Hours())
+}
+
 func TestGetNowDate(t *testing.T) {
 	assert := internal.NewAssert(t, "TestGetNowDate")
 	expected := time.Now().Format("2006-01-02")
@@ -231,3 +244,203 @@ func TestEndOfYear(t *testing.T) {

 	assert.Equal(expected, actual)
 }
+
+func TestIsLeapYear(t *testing.T) {
+	assert := internal.NewAssert(t, "TestEndOfYear")
+
+	result1 := IsLeapYear(2000)
+	result2 := IsLeapYear(2001)
+
+	assert.Equal(true, result1)
+	assert.Equal(false, result2)
+}
+
+func TestBetweenSeconds(t *testing.T) {
+	assert := internal.NewAssert(t, "TestBetweenSeconds")
+
+	today := time.Now()
+	tomorrow := AddDay(today, 1)
+	yesterday := AddDay(today, -1)
+
+	result1 := BetweenSeconds(today, tomorrow)
+	result2 := BetweenSeconds(today, yesterday)
+
+	assert.Equal(int64(86400), result1)
+	assert.Equal(int64(-86400), result2)
+}
+
+func TestDayOfYear(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDayOfYear")
+	date1 := time.Date(2023, 02, 01, 1, 1, 1, 0, time.Local)
+	result1 := DayOfYear(date1)
+	assert.Equal(31, result1)
+
+	date2 := time.Date(2023, 01, 02, 1, 1, 1, 0, time.Local)
+	result2 := DayOfYear(date2)
+	assert.Equal(1, result2)
+
+	date3 := time.Date(2023, 01, 01, 1, 1, 1, 0, time.Local)
+	result3 := DayOfYear(date3)
+	assert.Equal(0, result3)
+}
+
+func TestIsWeekend(t *testing.T) {
+	assert := internal.NewAssert(t, "TestIsWeekend")
+	date := time.Date(2023, 06, 03, 0, 0, 0, 0, time.Local)
+	result := IsWeekend(date)
+	assert.Equal(true, result)
+
+	date1 := time.Date(2023, 06, 04, 0, 0, 0, 0, time.Local)
+	result1 := IsWeekend(date1)
+	assert.Equal(true, result1)
+
+	date2 := time.Date(2023, 06, 02, 0, 0, 0, 0, time.Local)
+	result2 := IsWeekend(date2)
+	assert.Equal(false, result2)
+}
+
+func TestNowDateOrTime(t *testing.T) {
+	t.Parallel()
+
+	formats := []string{
+		"yyyy-mm-dd hh:mm:ss",
+		"yyyy-mm-dd",
+		"dd-mm-yy hh:mm:ss",
+		"yyyy/mm/dd hh:mm:ss",
+		"hh:mm:ss",
+		"yyyy/mm",
+		"yyyy-mm-dd hh",
+	}
+
+	for i := 0; i < len(formats); i++ {
+		result := NowDateOrTime(formats[i], "UTC")
+		t.Log(result)
+	}
+}
+
+func TestTimestamp(t *testing.T) {
+	t.Parallel()
+
+	ts1 := Timestamp()
+	t.Log(ts1)
+
+	ts2 := TimestampMilli()
+	t.Log(ts2)
+
+	ts3 := TimestampMicro()
+	t.Log(ts3)
+
+	ts4 := TimestampNano()
+	t.Log(ts4)
+}
+
+func TestTrackFuncTime(t *testing.T) {
+	defer TrackFuncTime(time.Now())()
+
+	var n int
+	for i := 0; i < 5000000; i++ {
+		n++
+	}
+}
+
+func TestDaysBetween(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestDaysBetween")
+
+	tests := []struct {
+		start    time.Time
+		end      time.Time
+		expected int
+	}{
+		{
+			start:    time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
+			end:      time.Date(2024, time.September, 10, 0, 0, 0, 0, time.UTC),
+			expected: 9,
+		},
+		{
+			start:    time.Date(2024, time.September, 10, 0, 0, 0, 0, time.UTC),
+			end:      time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
+			expected: -9,
+		},
+		{
+			start:    time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
+			end:      time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
+			expected: 0,
+		},
+		{
+			start:    time.Date(2024, time.January, 1, 0, 0, 0, 0, time.UTC),
+			end:      time.Date(2024, time.December, 31, 0, 0, 0, 0, time.UTC),
+			expected: 365,
+		},
+		{
+			start:    time.Date(2024, time.March, 1, 0, 0, 0, 0, time.UTC),
+			end:      time.Date(2024, time.March, 31, 0, 0, 0, 0, time.UTC),
+			expected: 30,
+		},
+	}
+
+	for _, tt := range tests {
+		result := DaysBetween(tt.start, tt.end)
+		assert.Equal(tt.expected, result)
+	}
+}
+
+func TestGenerateDatetimesBetween(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestGenerateDatetimesBetween")
+
+	tests := []struct {
+		start    time.Time
+		end      time.Time
+		layout   string
+		interval string
+		expected []string
+	}{
+		{
+			start:    time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
+			end:      time.Date(2024, time.September, 1, 2, 0, 0, 0, time.UTC),
+			layout:   "2006-01-02 15:04:05",
+			interval: "30m",
+			expected: []string{
+				"2024-09-01 00:00:00",
+				"2024-09-01 00:30:00",
+				"2024-09-01 01:00:00",
+				"2024-09-01 01:30:00",
+				"2024-09-01 02:00:00",
+			},
+		},
+		{
+			start:    time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
+			end:      time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
+			layout:   "2006-01-02 15:04:05",
+			interval: "1h",
+			expected: []string{"2024-09-01 00:00:00"},
+		},
+		{
+			start:    time.Date(2024, time.September, 1, 0, 0, 0, 0, time.UTC),
+			end:      time.Date(2024, time.September, 1, 3, 0, 0, 0, time.UTC),
+			layout:   "2006-01-02 15:04:05",
+			interval: "2h",
+			expected: []string{
+				"2024-09-01 00:00:00",
+				"2024-09-01 02:00:00",
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		result, err := GenerateDatetimesBetween(tt.start, tt.end, tt.layout, tt.interval)
+
+		assert.Equal(tt.expected, result)
+		assert.IsNil(err)
+	}
+
+	t.Run("Invalid interval", func(t *testing.T) {
+		_, err := GenerateDatetimesBetween(time.Now(), time.Now(), "2006-01-02 15:04:05", "invalid")
+		if err == nil {
+			t.Fatal("Expected error, got nil")
+		}
+	})
+}
--- a/docs/algorithm.md
+++ b/docs/algorithm.md
@@ -1,593 +0,0 @@
-# Algorithm
-Package algorithm implements some basic algorithm. eg. sort, search.
-
-<div STYLE="page-break-after: always;"></div>
-
-## Source
-
- [https://github.com/duke-git/lancet/blob/main/algorithm/sorter.go](https://github.com/duke-git/lancet/blob/main/algorithm/sorter.go)
- [https://github.com/duke-git/lancet/blob/main/algorithm/search.go](https://github.com/duke-git/lancet/blob/main/algorithm/search.go)
- [https://github.com/duke-git/lancet/blob/main/algorithm/lru_cache.go](https://github.com/duke-git/lancet/blob/main/algorithm/lru_cache.go)
-
-<div STYLE="page-break-after: always;"></div>
-
-## Usage
-```go
-import (
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-```
-
-<div STYLE="page-break-after: always;"></div>
-
-## Index
- [BubbleSort](#BubbleSort)
- [CountSort](#CountSort)
- [HeapSort](#HeapSort)
- [InsertionSort](#InsertionSort)
- [MergeSort](#MergeSort)
- [QuickSort](#QuickSort)
- [SelectionSort](#SelectionSort)
- [ShellSort](#ShellSort)
- [BinarySearch](#BinarySearch)
- [BinaryIterativeSearch](#BinaryIterativeSearch)
- [LinearSearch](#LinearSearch)
- [LRUCache](#LRUCache)
-
-<div STYLE="page-break-after: always;"></div>
-
-## Documentation
-
-
-
-### <span id="BubbleSort">BubbleSort</span>
-<p>Sort slice with bubble sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
-
-<b>Signature:</b>
-
-```go
-func BubbleSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    sortedSlice := algorithm.BubbleSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
-}
-```
-
-
-
-
-### <span id="InsertionSort">InsertionSort</span>
-<p>Sort slice with insertion sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
-
-<b>Signature:</b>
-
-```go
-func InsertionSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type people struct {
-        Name string
-        Age  int
-    }
-
-    // PeopleAageComparator sort people slice by age field
-    type peopleAgeComparator struct{}
-
-    // Compare implements github.com/duke-git/lancet/lancetconstraints/constraints.go/Comparator
-    func (pc *peopleAgeComparator) Compare(v1 any, v2 any) int {
-        p1, _ := v1.(people)
-        p2, _ := v2.(people)
-
-        //ascending order
-        if p1.Age < p2.Age {
-            return -1
-        } else if p1.Age > p2.Age {
-            return 1
-        }
-        return 0
-
-        //decending order
-        // if p1.Age > p2.Age {
-        // 	return -1
-        // } else if p1.Age < p2.Age {
-        // 	return 1
-        // }
-    }
-
-    var peoples = []people{
-        {Name: "a", Age: 20},
-        {Name: "b", Age: 10},
-        {Name: "c", Age: 17},
-        {Name: "d", Age: 8},
-        {Name: "e", Age: 28},
-    }
-    comparator := &peopleAgeComparator{}
-    sortedPeople := algorithm.InsertionSort(peoples, comparator)
-
-    fmt.Println(sortedSlice) //[{d 8} {b 10} {c 17} {a 20} {e 28}]
-}
-```
-
-
-
-
-### <span id="SelectionSort">SelectionSort</span>
-<p>Sort slice with selection sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
-
-<b>Signature:</b>
-
-```go
-func SelectionSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    sortedSlice := algorithm.SelectionSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
-}
-```
-
-
-
-
-### <span id="ShellSort">ShellSort</span>
-<p>Sort slice with shell sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
-
-<b>Signature:</b>
-
-```go
-func ShellSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    sortedSlice := algorithm.ShellSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
-}
-```
-
-
-
-
-### <span id="QuickSort">QuickSort</span>
-<p>Sort slice with quick sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
-
-<b>Signature:</b>
-
-```go
-func QuickSort[T any](slice []T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    sortedSlice := algorithm.QuickSort(intSlice, 0, len(intSlice)-1, comparator)
-
-    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
-}
-```
-
-
-
-
-### <span id="HeapSort">HeapSort</span>
-<p>Sort slice with heap sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
-
-<b>Signature:</b>
-
-```go
-func HeapSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    sortedSlice := algorithm.HeapSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
-}
-```
-
-
-
-
-### <span id="MergeSort">MergeSort</span>
-<p>Sort slice with merge sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
-
-<b>Signature:</b>
-
-```go
-func MergeSort[T any](slice []T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    sortedSlice := algorithm.MergeSort(intSlice, 0, len(intSlice)-1, comparator)
-
-    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
-}
-```
-
-
-
-### <span id="CountSort">CountSort</span>
-<p>Sort slice with count sort algorithm. Param comparator should implements lancetconstraints.Comparator.</p>
-
-<b>Signature:</b>
-
-```go
-func CountSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    sortedSlice := algorithm.CountSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
-}
-```
-
-
-
-
-### <span id="BinarySearch">BinarySearch</span>
-<p>BinarySearch search for target within a sorted slice, recursive call itself. If a target is found, the index of the target is returned. Else the function return -1.</p>
-
-<b>Signature:</b>
-
-```go
-func BinarySearch[T any](sortedSlice []T, target T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) int
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    var sortedNumbers = []int{1, 2, 3, 4, 5, 6, 7, 8}
-    comparator := &intComparator{}
-    foundIndex := algorithm.BinarySearch(sortedNumbers, 5, 0, len(sortedNumbers)-1, comparator)
-    fmt.Println(foundIndex) //4
-
-    notFoundIndex := algorithm.BinarySearch(sortedNumbers, 9, 0, len(sortedNumbers)-1, comparator)
-    fmt.Println(notFoundIndex) //-1
-}
-```
-
-
-
-### <span id="BinaryIterativeSearch">BinaryIterativeSearch</span>
-<p>BinaryIterativeSearch search for target within a sorted slice, recursive call itself. If a target is found, the index of the target is returned. Else the function return -1.</p>
-
-<b>Signature:</b>
-
-```go
-func BinaryIterativeSearch[T any](sortedSlice []T, target T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) int
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    var sortedNumbers = []int{1, 2, 3, 4, 5, 6, 7, 8}
-    comparator := &intComparator{}
-    foundIndex := algorithm.BinaryIterativeSearch(sortedNumbers, 5, 0, len(sortedNumbers)-1, comparator)
-    fmt.Println(foundIndex) //4
-
-    notFoundIndex := algorithm.BinaryIterativeSearch(sortedNumbers, 9, 0, len(sortedNumbers)-1, comparator)
-    fmt.Println(notFoundIndex) //-1
-}
-```
-
-
-
-
-### <span id="LinearSearch">LinearSearch</span>
-<p>LinearSearch Simple linear search algorithm that iterates over all elements of an slice. If a target is found, the index of the target is returned. Else the function return -1.</p>
-
-<b>Signature:</b>
-
-```go
-func LinearSearch[T any](slice []T, target T, comparator lancetconstraints.Comparator) int
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    foundIndex := algorithm.LinearSearch(intSlice, 5, comparator)
-    fmt.Println(foundIndex) //2
-
-    notFoundIndex := algorithm.LinearSearch(sortedNumbers, 0, comparator)
-    fmt.Println(notFoundIndex) //-1
-}
-```
-
-
-
-
-### <span id="LRUCache">LRUCache</span>
-<p>LRUCache implements mem cache with lru.</p>
-
-<b>Signature:</b>
-
-```go
-func NewLRUCache[K comparable, V any](capacity int) *LRUCache[K, V]
-func (l *LRUCache[K, V]) Get(key K) (V, bool)
-func (l *LRUCache[K, V]) Put(key K, value V)
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    cache := algorithm.NewLRUCache[int, int](2)
-
-	cache.Put(1, 1)
-	cache.Put(2, 2)
-
-    _, ok := cache.Get(0) // ok -> false
-
-    v, ok := cache.Get(1) // v->1, ok->true
-
-}
-```
--- a/docs/algorithm_zh-CN.md
+++ b/docs/algorithm_zh-CN.md
@@ -1,593 +0,0 @@
-# Algorithm
-algorithm算法包实现一些基本算法，sort，search，lrucache。
-
-<div STYLE="page-break-after: always;"></div>
-
-## 源码
-
- [https://github.com/duke-git/lancet/blob/main/algorithm/sorter.go](https://github.com/duke-git/lancet/blob/main/algorithm/sorter.go)
- [https://github.com/duke-git/lancet/blob/main/algorithm/search.go](https://github.com/duke-git/lancet/blob/main/algorithm/search.go)
- [https://github.com/duke-git/lancet/blob/main/algorithm/lru_cache.go](https://github.com/duke-git/lancet/blob/main/algorithm/lru_cache.go)
-
-<div STYLE="page-break-after: always;"></div>
-
-## 用法
-```go
-import (
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-```
-
-<div STYLE="page-break-after: always;"></div>
-
-## 目录
- [BubbleSort](#BubbleSort)
- [CountSort](#CountSort)
- [HeapSort](#HeapSort)
- [InsertionSort](#InsertionSort)
- [MergeSort](#MergeSort)
- [QuickSort](#QuickSort)
- [SelectionSort](#SelectionSort)
- [ShellSort](#ShellSort)
- [BinarySearch](#BinarySearch)
- [BinaryIterativeSearch](#BinaryIterativeSearch)
- [LinearSearch](#LinearSearch)
- [LRUCache](#LRUCache)
-
-<div STYLE="page-break-after: always;"></div>
-
-## 文档
-
-
-
-### <span id="BubbleSort">BubbleSort</span>
-<p>冒泡排序，参数comparator需要实现包lancetconstraints.Comparator</p>
-
-<b>函数签名:</b>
-
-```go
-func BubbleSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    sortedSlice := algorithm.BubbleSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
-}
-```
-
-
-
-
-### <span id="InsertionSort">InsertionSort</span>
-<p>插入排序，参数comparator需要实现包lancetconstraints.Comparator</p>
-
-<b>函数签名:</b>
-
-```go
-func InsertionSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type people struct {
-        Name string
-        Age  int
-    }
-
-    // PeopleAageComparator sort people slice by age field
-    type peopleAgeComparator struct{}
-
-    // Compare implements github.com/duke-git/lancet/lancetconstraints/constraints.go/Comparator
-    func (pc *peopleAgeComparator) Compare(v1 any, v2 any) int {
-        p1, _ := v1.(people)
-        p2, _ := v2.(people)
-
-        //ascending order
-        if p1.Age < p2.Age {
-            return -1
-        } else if p1.Age > p2.Age {
-            return 1
-        }
-        return 0
-
-        //decending order
-        // if p1.Age > p2.Age {
-        // 	return -1
-        // } else if p1.Age < p2.Age {
-        // 	return 1
-        // }
-    }
-
-    var peoples = []people{
-        {Name: "a", Age: 20},
-        {Name: "b", Age: 10},
-        {Name: "c", Age: 17},
-        {Name: "d", Age: 8},
-        {Name: "e", Age: 28},
-    }
-    comparator := &peopleAgeComparator{}
-    sortedPeople := algorithm.InsertionSort(peoples, comparator)
-
-    fmt.Println(sortedSlice) //[{d 8} {b 10} {c 17} {a 20} {e 28}]
-}
-```
-
-
-
-
-### <span id="SelectionSort">SelectionSort</span>
-<p>选择排序，参数comparator需要实现包lancetconstraints.Comparator</p>
-
-<b>函数签名:</b>
-
-```go
-func SelectionSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    sortedSlice := algorithm.SelectionSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
-}
-```
-
-
-
-
-### <span id="ShellSort">ShellSort</span>
-<p>希尔排序，参数comparator需要实现包lancetconstraints.Comparator</p>
-
-<b>函数签名:</b>
-
-```go
-func ShellSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    sortedSlice := algorithm.ShellSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
-}
-```
-
-
-
-
-### <span id="QuickSort">QuickSort</span>
-<p>快速排序，参数comparator需要实现包lancetconstraints.Comparator</p>
-
-<b>函数签名:</b>
-
-```go
-func QuickSort[T any](slice []T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    sortedSlice := algorithm.QuickSort(intSlice, 0, len(intSlice)-1, comparator)
-
-    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
-}
-```
-
-
-
-
-### <span id="HeapSort">HeapSort</span>
-<p>堆排序，参数comparator需要实现包lancetconstraints.Comparator</p>
-
-<b>函数签名:</b>
-
-```go
-func HeapSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    sortedSlice := algorithm.HeapSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
-}
-```
-
-
-
-
-### <span id="MergeSort">MergeSort</span>
-<p>归并排序，参数comparator需要实现包lancetconstraints.Comparator</p>
-
-<b>函数签名:</b>
-
-```go
-func MergeSort[T any](slice []T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    sortedSlice := algorithm.MergeSort(intSlice, 0, len(intSlice)-1, comparator)
-
-    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
-}
-```
-
-
-
-### <span id="CountSort">CountSort</span>
-<p>计数排序，参数comparator需要实现包lancetconstraints.Comparator</p>
-
-<b>函数签名:</b>
-
-```go
-func CountSort[T any](slice []T, comparator lancetconstraints.Comparator) []T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    sortedSlice := algorithm.CountSort(intSlice, comparator)
-
-    fmt.Println(sortedSlice) //[]int{1, 2, 3, 4, 5, 6}
-}
-```
-
-
-
-
-### <span id="BinarySearch">BinarySearch</span>
-<p>二分递归查找，返回元素索引，未找到元素返回-1，参数comparator需要实现包lancetconstraints.Comparator</p>
-
-<b>函数签名:</b>
-
-```go
-func BinarySearch[T any](sortedSlice []T, target T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) int
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    var sortedNumbers = []int{1, 2, 3, 4, 5, 6, 7, 8}
-    comparator := &intComparator{}
-    foundIndex := algorithm.BinarySearch(sortedNumbers, 5, 0, len(sortedNumbers)-1, comparator)
-    fmt.Println(foundIndex) //4
-
-    notFoundIndex := algorithm.BinarySearch(sortedNumbers, 9, 0, len(sortedNumbers)-1, comparator)
-    fmt.Println(notFoundIndex) //-1
-}
-```
-
-
-
-### <span id="BinaryIterativeSearch">BinaryIterativeSearch</span>
-<p>二分迭代查找，返回元素索引，未找到元素返回-1，参数comparator需要实现包lancetconstraints.Comparator</p>
-
-<b>函数签名:</b>
-
-```go
-func BinaryIterativeSearch[T any](sortedSlice []T, target T, lowIndex, highIndex int, comparator lancetconstraints.Comparator) int
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    var sortedNumbers = []int{1, 2, 3, 4, 5, 6, 7, 8}
-    comparator := &intComparator{}
-    foundIndex := algorithm.BinaryIterativeSearch(sortedNumbers, 5, 0, len(sortedNumbers)-1, comparator)
-    fmt.Println(foundIndex) //4
-
-    notFoundIndex := algorithm.BinaryIterativeSearch(sortedNumbers, 9, 0, len(sortedNumbers)-1, comparator)
-    fmt.Println(notFoundIndex) //-1
-}
-```
-
-
-
-
-### <span id="LinearSearch">LinearSearch</span>
-<p>线性查找，返回元素索引，未找到元素返回-1，参数comparator需要实现包lancetconstraints.Comparator</p>
-
-<b>函数签名:</b>
-
-```go
-func LinearSearch[T any](slice []T, target T, comparator lancetconstraints.Comparator) int
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    type intComparator struct{}
-
-    func (c *intComparator) Compare(v1 any, v2 any) int {
-        val1, _ := v1.(int)
-        val2, _ := v2.(int)
-
-        //ascending order
-        if val1 < val2 {
-            return -1
-        } else if val1 > val2 {
-            return 1
-        }
-        return 0
-    }
-
-    intSlice := []int{2, 1, 5, 3, 6, 4}
-    comparator := &intComparator{}
-    foundIndex := algorithm.LinearSearch(intSlice, 5, comparator)
-    fmt.Println(foundIndex) //2
-
-    notFoundIndex := algorithm.LinearSearch(sortedNumbers, 0, comparator)
-    fmt.Println(notFoundIndex) //-1
-}
-```
-
-
-
-
-### <span id="LRUCache">LRUCache</span>
-<p>lru实现缓存</p>
-
-<b>函数签名:</b>
-
-```go
-func NewLRUCache[K comparable, V any](capacity int) *LRUCache[K, V]
-func (l *LRUCache[K, V]) Get(key K) (V, bool)
-func (l *LRUCache[K, V]) Put(key K, value V)
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/algorithm"
-)
-
-func main() {
-    cache := algorithm.NewLRUCache[int, int](2)
-
-	cache.Put(1, 1)
-	cache.Put(2, 2)
-
-    _, ok := cache.Get(0) // ok -> false
-
-    v, ok := cache.Get(1) // v->1, ok->true
-
-}
-```
--- a/docs/compare.md
+++ b/docs/compare.md
@@ -0,0 +1,326 @@
+# Compare
+
+Package compare provides a lightweight comparison function on any type.
+
+<div STYLE="page-break-after: always;"></div>
+
+## Source:
+
+-   [https://github.com/duke-git/lancet/blob/v1/compare/compare.go](https://github.com/duke-git/lancet/blob/v1/compare/compare.go)
+
+-   [https://github.com/duke-git/lancet/blob/v1/compare/compare_internal.go](https://github.com/duke-git/lancet/blob/v1/compare/compare_internal.go)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Usage:
+
+```go
+import (
+    "github.com/duke-git/lancet/condition"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## Index
+
+-   [Equal](#Equal)
+-   [EqualValue](#EqualValue)
+-   [LessThan](#LessThan)
+-   [GreaterThan](#GreaterThan)
+-   [LessOrEqual](#LessOrEqual)
+-   [GreaterOrEqual](#GreaterOrEqual)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Documentation
+
+### <span id="Equal">Equal</span>
+
+<p>Checks if two values are equal or not. (check both type and value)</p>
+
+<b>Signature:</b>
+
+```go
+func Equal(left, right interface{}) bool
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/compare"
+)
+
+func main() {
+    result1 := compare.Equal(1, 1)
+    result2 := compare.Equal("1", "1")
+    result3 := compare.Equal([]int{1, 2, 3}, []int{1, 2, 3})
+    result4 := compare.Equal(map[int]string{1: "a", 2: "b"}, map[int]string{1: "a", 2: "b"})
+
+    result5 := compare.Equal(1, "1")
+    result6 := compare.Equal(1, int64(1))
+    result7 := compare.Equal([]int{1, 2}, []int{1, 2, 3})
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+    fmt.Println(result6)
+    fmt.Println(result7)
+
+    // Output:
+    // true
+    // true
+    // true
+    // true
+    // false
+    // false
+    // false
+}
+```
+
+### <span id="EqualValue">EqualValue</span>
+
+<p>Checks if two values are equal or not. (check value only)</p>
+
+<b>Signature:</b>
+
+```go
+func EqualValue(left, right interface{}) bool
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/compare"
+)
+
+func main() {
+    result1 := compare.EqualValue(1, 1)
+    result2 := compare.EqualValue(int(1), int64(1))
+    result3 := compare.EqualValue(1, "1")
+    result4 := compare.EqualValue(1, "2")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+
+    // Output:
+    // true
+    // true
+    // true
+    // false
+}
+```
+
+### <span id="LessThan">LessThan</span>
+
+<p>Checks if value `left` less than value `right`.</p>
+
+<b>Signature:</b>
+
+```go
+func LessThan(left, right interface{}) bool
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/compare"
+)
+
+func main() {
+    result1 := compare.LessThan(1, 2)
+    result2 := compare.LessThan(1.1, 2.2)
+    result3 := compare.LessThan("a", "b")
+
+    time1 := time.Now()
+    time2 := time1.Add(time.Second)
+    result4 := compare.LessThan(time1, time2)
+
+    result5 := compare.LessThan(2, 1)
+    result6 := compare.LessThan(1, int64(2))
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+    fmt.Println(result6)
+
+    // Output:
+    // true
+    // true
+    // true
+    // true
+    // false
+    // false
+}
+```
+
+### <span id="GreaterThan">GreaterThan</span>
+
+<p>Checks if value `left` greater than value `right`.</p>
+
+<b>Signature:</b>
+
+```go
+func GreaterThan(left, right interface{}) bool
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/compare"
+)
+
+func main() {
+    result1 := compare.GreaterThan(2, 1)
+    result2 := compare.GreaterThan(2.2, 1.1)
+    result3 := compare.GreaterThan("b", "a")
+
+    time1 := time.Now()
+    time2 := time1.Add(time.Second)
+    result4 := compare.GreaterThan(time2, time1)
+
+    result5 := compare.GreaterThan(1, 2)
+    result6 := compare.GreaterThan(int64(2), 1)
+    result7 := compare.GreaterThan("b", "c")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+    fmt.Println(result6)
+    fmt.Println(result7)
+
+    // Output:
+    // true
+    // true
+    // true
+    // true
+    // false
+    // false
+    // false
+}
+```
+
+### <span id="LessOrEqual">LessOrEqual</span>
+
+<p>Checks if value `left` less than or equal than value `right`.</p>
+
+<b>Signature:</b>
+
+```go
+func LessOrEqual(left, right interface{}) bool
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/compare"
+)
+
+func main() {
+    result1 := compare.LessOrEqual(1, 1)
+    result2 := compare.LessOrEqual(1.1, 2.2)
+    result3 := compare.LessOrEqual("a", "b")
+
+    time1 := time.Now()
+    time2 := time1.Add(time.Second)
+    result4 := compare.LessOrEqual(time1, time2)
+
+    result5 := compare.LessOrEqual(2, 1)
+    result6 := compare.LessOrEqual(1, int64(2))
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+    fmt.Println(result6)
+
+    // Output:
+    // true
+    // true
+    // true
+    // true
+    // false
+    // false
+}
+```
+
+### <span id="GreaterOrEqual">GreaterOrEqual</span>
+
+<p>Checks if value `left` less greater or equal than value `right`.</p>
+
+<b>Signature:</b>
+
+```go
+func GreaterOrEqual(left, right interface{}) bool
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/compare"
+)
+
+func main() {
+    result1 := compare.GreaterOrEqual(1, 1)
+    result2 := compare.GreaterOrEqual(2.2, 1.1)
+    result3 := compare.GreaterOrEqual("b", "b")
+
+    time1 := time.Now()
+    time2 := time1.Add(time.Second)
+    result4 := compare.GreaterOrEqual(time2, time1)
+
+    result5 := compare.GreaterOrEqual(1, 2)
+    result6 := compare.GreaterOrEqual(int64(2), 1)
+    result7 := compare.GreaterOrEqual("b", "c")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+    fmt.Println(result6)
+    fmt.Println(result7)
+
+    // Output:
+    // true
+    // true
+    // true
+    // true
+    // false
+    // false
+    // false
+}
+```
--- a/docs/compare_zh-CN.md
+++ b/docs/compare_zh-CN.md
@@ -0,0 +1,326 @@
+# Compare
+
+compare包提供几个轻量级的类型比较函数。
+
+<div STYLE="page-break-after: always;"></div>
+
+## 源码:
+
+-   [https://github.com/duke-git/lancet/blob/v1/compare/compare.go](https://github.com/duke-git/lancet/blob/v1/compare/compare.go)
+
+-   [https://github.com/duke-git/lancet/blob/v1/compare/compare_internal.go](https://github.com/duke-git/lancet/blob/v1/compare/compare_internal.go)
+
+<div STYLE="page-break-after: always;"></div>
+
+## 用法:
+
+```go
+import (
+    "github.com/duke-git/lancet/condition"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## 目录
+
+-   [Equal](#Equal)
+-   [EqualValue](#EqualValue)
+-   [LessThan](#LessThan)
+-   [GreaterThan](#GreaterThan)
+-   [LessOrEqual](#LessOrEqual)
+-   [GreaterOrEqual](#GreaterOrEqual)
+
+<div STYLE="page-break-after: always;"></div>
+
+## Documentation
+
+### <span id="Equal">Equal</span>
+
+<p>检查两个值是否相等(检查类型和值)</p>
+
+<b>函数签名:</b>
+
+```go
+func Equal(left, right interface{}) bool
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/compare"
+)
+
+func main() {
+    result1 := compare.Equal(1, 1)
+    result2 := compare.Equal("1", "1")
+    result3 := compare.Equal([]int{1, 2, 3}, []int{1, 2, 3})
+    result4 := compare.Equal(map[int]string{1: "a", 2: "b"}, map[int]string{1: "a", 2: "b"})
+
+    result5 := compare.Equal(1, "1")
+    result6 := compare.Equal(1, int64(1))
+    result7 := compare.Equal([]int{1, 2}, []int{1, 2, 3})
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+    fmt.Println(result6)
+    fmt.Println(result7)
+
+    // Output:
+    // true
+    // true
+    // true
+    // true
+    // false
+    // false
+    // false
+}
+```
+
+### <span id="EqualValue">EqualValue</span>
+
+<p>检查两个值是否相等(只检查值)</p>
+
+<b>函数签名:</b>
+
+```go
+func EqualValue(left, right interface{}) bool
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/compare"
+)
+
+func main() {
+    result1 := compare.EqualValue(1, 1)
+    result2 := compare.EqualValue(int(1), int64(1))
+    result3 := compare.EqualValue(1, "1")
+    result4 := compare.EqualValue(1, "2")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+
+    // Output:
+    // true
+    // true
+    // true
+    // false
+}
+```
+
+### <span id="LessThan">LessThan</span>
+
+<p>验证参数`left`的值是否小于参数`right`的值。</p>
+
+<b>函数签名:</b>
+
+```go
+func LessThan(left, right interface{}) bool
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/compare"
+)
+
+func main() {
+    result1 := compare.LessThan(1, 2)
+    result2 := compare.LessThan(1.1, 2.2)
+    result3 := compare.LessThan("a", "b")
+
+    time1 := time.Now()
+    time2 := time1.Add(time.Second)
+    result4 := compare.LessThan(time1, time2)
+
+    result5 := compare.LessThan(2, 1)
+    result6 := compare.LessThan(1, int64(2))
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+    fmt.Println(result6)
+
+    // Output:
+    // true
+    // true
+    // true
+    // true
+    // false
+    // false
+}
+```
+
+### <span id="GreaterThan">GreaterThan</span>
+
+<p>验证参数`left`的值是否大于参数`right`的值。</p>
+
+<b>函数签名:</b>
+
+```go
+func GreaterThan(left, right interface{}) bool
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/compare"
+)
+
+func main() {
+    result1 := compare.GreaterThan(2, 1)
+    result2 := compare.GreaterThan(2.2, 1.1)
+    result3 := compare.GreaterThan("b", "a")
+
+    time1 := time.Now()
+    time2 := time1.Add(time.Second)
+    result4 := compare.GreaterThan(time2, time1)
+
+    result5 := compare.GreaterThan(1, 2)
+    result6 := compare.GreaterThan(int64(2), 1)
+    result7 := compare.GreaterThan("b", "c")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+    fmt.Println(result6)
+    fmt.Println(result7)
+
+    // Output:
+    // true
+    // true
+    // true
+    // true
+    // false
+    // false
+    // false
+}
+```
+
+### <span id="LessOrEqual">LessOrEqual</span>
+
+<p>验证参数`left`的值是否小于或等于参数`right`的值。</p>
+
+<b>函数签名:</b>
+
+```go
+func LessOrEqual(left, right interface{}) bool
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/compare"
+)
+
+func main() {
+    result1 := compare.LessOrEqual(1, 1)
+    result2 := compare.LessOrEqual(1.1, 2.2)
+    result3 := compare.LessOrEqual("a", "b")
+
+    time1 := time.Now()
+    time2 := time1.Add(time.Second)
+    result4 := compare.LessOrEqual(time1, time2)
+
+    result5 := compare.LessOrEqual(2, 1)
+    result6 := compare.LessOrEqual(1, int64(2))
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+    fmt.Println(result6)
+
+    // Output:
+    // true
+    // true
+    // true
+    // true
+    // false
+    // false
+}
+```
+
+### <span id="GreaterOrEqual">GreaterOrEqual</span>
+
+<p>验证参数`left`的值是否大于或参数`right`的值。</p>
+
+<b>函数签名:</b>
+
+```go
+func GreaterOrEqual(left, right interface{}) bool
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/compare"
+)
+
+func main() {
+    result1 := compare.GreaterOrEqual(1, 1)
+    result2 := compare.GreaterOrEqual(2.2, 1.1)
+    result3 := compare.GreaterOrEqual("b", "b")
+
+    time1 := time.Now()
+    time2 := time1.Add(time.Second)
+    result4 := compare.GreaterOrEqual(time2, time1)
+
+    result5 := compare.GreaterOrEqual(1, 2)
+    result6 := compare.GreaterOrEqual(int64(2), 1)
+    result7 := compare.GreaterOrEqual("b", "c")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+    fmt.Println(result6)
+    fmt.Println(result7)
+
+    // Output:
+    // true
+    // true
+    // true
+    // true
+    // false
+    // false
+    // false
+}
+```
--- a/docs/convertor.md
+++ b/docs/convertor.md
--- a/docs/convertor_zh-CN.md
+++ b/docs/convertor_zh-CN.md
--- a/docs/cryptor.md
+++ b/docs/cryptor.md
--- a/docs/cryptor_zh-CN.md
+++ b/docs/cryptor_zh-CN.md
--- a/docs/datetime.md
+++ b/docs/datetime.md
--- a/docs/datetime_zh-CN.md
+++ b/docs/datetime_zh-CN.md
--- a/docs/fileutil.md
+++ b/docs/fileutil.md
@@ -1,47 +1,61 @@
 # Fileutil
+
 Package fileutil implements some basic functions for file operations.

 <div STYLE="page-break-after: always;"></div>

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/fileutil/file.go](https://github.com/duke-git/lancet/blob/main/fileutil/file.go)
+[https://github.com/duke-git/lancet/blob/v1/fileutil/file.go](https://github.com/duke-git/lancet/blob/v1/fileutil/file.go)

 <div STYLE="page-break-after: always;"></div>

 ## Usage:
+
 ```go
 import (
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )
 ```

 <div STYLE="page-break-after: always;"></div>

 ## Index
- [ClearFile](#ClearFile)
- [CreateFile](#CreateFile)
- [CopyFile](#CopyFile)
- [FileMode](#FileMode)
- [MiMeType](#MiMeType)
- [IsExist](#IsExist)
- [IsLink](#IsLink)
- [IsDir](#IsDir)
- [ListFileNames](#ListFileNames)
- [RemoveFile](#RemoveFile)
- [ReadFileToString](#ReadFileToString)
- [ReadFileByLine](#ReadFileByLine)
- [Zip](#Zip)

- [UnZip](#UnZip)
+-   [ClearFile](#ClearFile)
+-   [CreateFile](#CreateFile)
+-   [CreateDir](#CreateDir)
+-   [CopyFile](#CopyFile)
+-   [FileMode](#FileMode)
+-   [MiMeType](#MiMeType)
+-   [IsExist](#IsExist)
+-   [IsLink](#IsLink)
+-   [IsDir](#IsDir)
+-   [ListFileNames](#ListFileNames)
+-   [RemoveFile](#RemoveFile)
+-   [ReadFileToString](#ReadFileToString)
+-   [ReadFileByLine](#ReadFileByLine)
+-   [Zip](#Zip)
+-   [UnZip](#UnZip)
+-   [ZipAppendEntry](#ZipAppendEntry)
+-   [CurrentPath](#CurrentPath)
+-   [IsZipFile](#IsZipFile)
+-   [FileSize](#FileSize)
+-   [MTime](#MTime)
+-   [Sha](#Sha)
+-   [ReadCsvFile](#ReadCsvFile)
+-   [WriteCsvFile](#WriteCsvFile)
+-   [WriteMapsToCsv](#WriteMapsToCsv)
+-   [WriteStringToFile](#WriteStringToFile)
+-   [WriteBytesToFile](#WriteBytesToFile)
+-   [ReadFile](#ReadFile)

 <div STYLE="page-break-after: always;"></div>

 ## Documentation

-
-
 ### <span id="ClearFile">ClearFile</span>
+
 <p>Clear the file content, write empty string to the file.</p>

 <b>Signature:</b>
@@ -49,6 +63,7 @@ import (
 ```go
 func ClearFile(path string) error
 ```
+
 <b>Example:</b>

 ```go
@@ -56,7 +71,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -67,14 +82,16 @@ func main() {
 }
 ```

-### <span id="CreateFile">CreateFile</span>
-<p>Create file in path. return true if create succeed.</p>
+### <span id="CreateDir">CreateDir</span>
+
+<p>Create directory in absolute path. param `absPath` like /a/, /a/b/.</p>

 <b>Signature:</b>

 ```go
-func CreateFile(path string) bool
+func CreateDir(absPath string) error
 ```
+
 <b>Example:</b>

 ```go
@@ -82,7 +99,33 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    err := fileutil.CreateDir("/a/")
+    fmt.Println(err)
+}
+```
+
+### <span id="CreateFile">CreateFile</span>
+
+<p>Create file in path. return true if create succeed.</p>
+
+<b>Signature:</b>
+
+```go
+func CreateFile(path string) bool
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -91,8 +134,8 @@ func main() {
 }
 ```

-
 ### <span id="CopyFile">CopyFile</span>
+
 <p>Copy src file to dest file. If dest file exist will overwrite it.</p>

 <b>Signature:</b>
@@ -100,6 +143,7 @@ func main() {
 ```go
 func CopyFile(srcFilePath string, dstFilePath string) error
 ```
+
 <b>Example:</b>

 ```go
@@ -107,20 +151,19 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
    err := fileutil.CopyFile("./test.txt", "./test_copy.txt")
-	if err != nil {
-		fmt.Println(err)
-	}
+    if err != nil {
+        fmt.Println(err)
+    }
 }
 ```

-
-
 ### <span id="FileMode">FileMode</span>
+
 <p>Return file mode infomation.</p>

 <b>Signature:</b>
@@ -128,6 +171,7 @@ func main() {
 ```go
 func FileMode(path string) (fs.FileMode, error)
 ```
+
 <b>Example:</b>

 ```go
@@ -135,28 +179,28 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
    mode, err := fileutil.FileMode("./test.txt")
-	if err != nil {
-		fmt.Println(err)
-	}
+    if err != nil {
+        fmt.Println(err)
+    }
    fmt.Println(mode)
 }
 ```

-
-
 ### <span id="MiMeType">MiMeType</span>
+
 <p>Get file mime type, 'file' param's type should be string or *os.File.</p>

 <b>Signature:</b>

 ```go
-func MiMeType(file any) string
+func MiMeType(file interface{}) string
 ```
+
 <b>Example:</b>

 ```go
@@ -165,7 +209,7 @@ package main
 import (
    "fmt"
    "os"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -178,10 +222,8 @@ func main() {
 }
 ```

-
-
-
 ### <span id="IsExist">IsExist</span>
+
 <p>Checks if a file or directory exists.</p>

 <b>Signature:</b>
@@ -189,6 +231,7 @@ func main() {
 ```go
 func IsExist(path string) bool
 ```
+
 <b>Example:</b>

 ```go
@@ -196,7 +239,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -206,9 +249,8 @@ func main() {
 }
 ```

-
-
 ### <span id="IsLink">IsLink</span>
+
 <p>Checks if a file is symbol link or not.</p>

 <b>Signature:</b>
@@ -216,6 +258,7 @@ func main() {
 ```go
 func IsLink(path string) bool
 ```
+
 <b>Example:</b>

 ```go
@@ -223,7 +266,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -232,16 +275,16 @@ func main() {
 }
 ```

-
-
 ### <span id="IsDir">IsDir</span>
+
 <p>Checks if the path is directy or not.</p>

 <b>Signature:</b>

 ```go
-func IsDir(path string) bool 
+func IsDir(path string) bool
 ```
+
 <b>Example:</b>

 ```go
@@ -249,7 +292,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -261,9 +304,8 @@ func main() {
 }
 ```

-
-
 ### <span id="ListFileNames">ListFileNames</span>
+
 <p>List all file names in given path.</p>

 <b>Signature:</b>
@@ -271,6 +313,7 @@ func main() {
 ```go
 func ListFileNames(path string) ([]string, error)
 ```
+
 <b>Example:</b>

 ```go
@@ -278,7 +321,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -287,9 +330,8 @@ func main() {
 }
 ```

-
-
 ### <span id="RemoveFile">RemoveFile</span>
+
 <p>Remove the file of path.</p>

 <b>Signature:</b>
@@ -297,6 +339,7 @@ func main() {
 ```go
 func RemoveFile(path string) error
 ```
+
 <b>Example:</b>

 ```go
@@ -304,19 +347,19 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
    err := fileutil.RemoveFile("./test.txt")
    if err != nil {
-		fmt.Println(err)
-	}
+        fmt.Println(err)
+    }
 }
 ```

-
 ### <span id="ReadFileToString">ReadFileToString</span>
+
 <p>Return string of file content.</p>

 <b>Signature:</b>
@@ -324,6 +367,7 @@ func main() {
 ```go
 func ReadFileToString(path string) (string, error)
 ```
+
 <b>Example:</b>

 ```go
@@ -332,24 +376,23 @@ package main
 import (
    "fmt"
    "os"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
    path := "./test.txt"
-	fileutil.CreateFile(path)
+    fileutil.CreateFile(path)

-	f, _ := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0777)
-	f.WriteString("hello world")
+    f, _ := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0777)
+    f.WriteString("hello world")

-	content, _ := fileutil.ReadFileToString(path)
+    content, _ := fileutil.ReadFileToString(path)
    fmt.Println(content) //hello world
 }
 ```

-
-
 ### <span id="ReadFileByLine">ReadFileByLine</span>
+
 <p>Read file line by line, and return slice of lines</p>

 <b>Signature:</b>
@@ -357,6 +400,7 @@ func main() {
 ```go
 func ReadFileByLine(path string)([]string, error)
 ```
+
 <b>Example:</b>

 ```go
@@ -365,25 +409,24 @@ package main
 import (
    "fmt"
    "os"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
    path := "./text.txt"
-	fileutil.CreateFile(path)
+    fileutil.CreateFile(path)

-	f, _ := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0777)
-	defer f.Close()
-	f.WriteString("hello\nworld")
+    f, _ := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0777)
+    defer f.Close()
+    f.WriteString("hello\nworld")

-	contents, _ := fileutil.ReadFileByLine(path)
+    contents, _ := fileutil.ReadFileByLine(path)
    fmt.Println(contents) //[]string{"hello", "world"}
 }
 ```

-
-
 ### <span id="Zip">Zip</span>
+
 <p>Create a zip file of fpath, fpath could be a file or a directory.</p>

 <b>Signature:</b>
@@ -391,6 +434,7 @@ func main() {
 ```go
 func Zip(fpath string, destPath string) error
 ```
+
 <b>Example:</b>

 ```go
@@ -398,21 +442,19 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
-	err := fileutil.Zip("./test.txt", "./test.zip")
+    err := fileutil.Zip("./test.txt", "./test.zip")
    if err != nil {
        fmt.Println(err)
    }
 }
 ```

-
-
-
 ### <span id="UnZip">UnZip</span>
+
 <p>Unzip the file and save it to dest path.</p>

 <b>Signature:</b>
@@ -420,6 +462,7 @@ func main() {
 ```go
 func UnZip(zipFile string, destPath string) error
 ```
+
 <b>Example:</b>

 ```go
@@ -427,18 +470,455 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
-	err := fileutil.Zip("./test.zip", "./unzip/test.txt")
+    err := fileutil.Zip("./test.zip", "./unzip/test.txt")
    if err != nil {
        fmt.Println(err)
    }
 }
 ```

+### <span id="ZipAppendEntry">ZipAppendEntry</span>
+
+<p>Append a single file or directory by fpath to an existing zip file.</p>
+
+<b>Signature:</b>
+
+```go
+func ZipAppendEntry(fpath string, destPath string) error
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    err := fileutil.ZipAppendEntry("./test.txt", "./test.zip")
+    if err != nil {
+        fmt.Println(err)
+    }
+}
+```
+
+### <span id="CurrentPath">CurrentPath</span>
+
+<p>return current absolute path.</p>
+
+<b>Signature:</b>
+
+```go
+func CurrentPath() string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    absPath := CurrentPath()
+    fmt.Println(absPath)
+}
+```
+
+### <span id="IsZipFile">IsZipFile</span>
+
+<p>Checks if file is zip file or not.</p>
+
+<b>Signature:</b>
+
+```go
+func IsZipFile(filepath string) bool
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    isZip := IsZipFile("./zipfile.zip")
+    fmt.Println(isZip)
+}
+```
+
+### <span id="FileSize">FileSize</span>
+
+<p>Returns file size in bytes.</p>
+
+<b>Signature:</b>
+
+```go
+func FileSize(path string) (int64, error)
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    size, err := fileutil.FileSize("./testdata/test.txt")
+
+    fmt.Println(size)
+    fmt.Println(err)
+
+    // Output:
+    // 20
+    // <nil>
+}
+```
+
+### <span id="MTime">MTime</span>
+
+<p>Returns file modified time(unix timestamp).</p>
+
+<b>Signature:</b>
+
+```go
+func MTime(filepath string) (int64, error)
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    mtime, err := fileutil.MTime("./testdata/test.txt")
+
+    fmt.Println(mtime)
+    fmt.Println(err)
+
+    // Output:
+    // 1682391110
+    // <nil>
+}
+```
+
+### <span id="Sha">Sha</span>
+
+<p>returns file sha value, param `shaType` should be 1, 256 or 512.</p>
+
+<b>Signature:</b>
+
+```go
+func Sha(filepath string, shaType ...int) (string, error)
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    sha1, err := fileutil.Sha("./testdata/test.txt", 1)
+    sha256, _ := fileutil.Sha("./testdata/test.txt", 256)
+    sha512, _ := fileutil.Sha("./testdata/test.txt", 512)
+
+    fmt.Println(sha1)
+    fmt.Println(sha256)
+    fmt.Println(sha512)
+    fmt.Println(err)
+
+    // Output:
+    // dda3cf10c5a6ff6c6659a497bf7261b287af2bc7
+    // aa6d0a3fbc3442c228d606da09e0c1dc98c69a1cac3da1909199e0266171df35
+    // d22aba2a1b7a2e2f512756255cc1c3708905646920cb1eb95e45b531ba74774dbbb89baebf1f716220eb9cf4908f1cfc5b2a01267704d9a59f59d77cab609870
+    // <nil>
+}
+```
+
+### <span id="ReadCsvFile">ReadCsvFile</span>
+
+<p>Reads file content into slice.</p>
+
+<b>Signature:</b>
+
+```go
+func ReadCsvFile(filepath string) ([][]string, error)
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    content, err := fileutil.ReadCsvFile("./testdata/test.csv")
+
+    fmt.Println(content)
+    fmt.Println(err)
+
+    // Output:
+    // [[Bob  12  male] [Duke  14  male] [Lucy  16  female]]
+    // <nil>
+}
+```


+### <span id="WriteCsvFile">WriteCsvFile</span>
+
+<p>Write content to target csv file.</p>
+
+<b>Signature:</b>
+
+```go
+func WriteCsvFile(filepath string, records [][]string, append bool) error
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    data := [][]string{
+        {"Lili", "22", "female"},
+        {"Jim", "21", "male"},
+    }
+    err := WriteCsvFile("./testdata/test2.csv", data, false)
+    fmt.Println(err)
+
+    content, _ := ReadCsvFile("./testdata/test2.csv")
+    fmt.Println(content)
+
+    // Output:
+    // <nil>
+    // [[Lili 22 female] [Jim 21 male]]
+}
+```


+### <span id="WriteMapsToCsv">WriteMapsToCsv</span>
+
+<p>write slice of map to csv file.</p>
+
+<b>Signature:</b>
+
+```go
+// filepath: path of the CSV file.
+// records: slice of maps to be written. the value of map should be basic type. The maps will be sorted by key in alphabeta order, then be written into csv file.
+// appendToExistingFile: If true, data will be appended to the file if it exists.
+// delimiter: Delimiter to use in the CSV file.
+// headers: order of the csv column headers, needs to be consistent with the key of the map.
+func WriteMapsToCsv(filepath string, records []map[string]interface{}, appendToExistingFile bool, delimiter rune, headers ...[]string) error
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    fpath := "./test.csv"
+    fileutil.CreateFile(fpath)
+
+    f, _ := os.OpenFile(fpath, os.O_WRONLY|os.O_TRUNC, 0777)
+    defer f.Close()
+
+    records := []map[string]interface{}{
+        {"Name": "Lili", "Age": "22", "Gender": "female"},
+        {"Name": "Jim", "Age": "21", "Gender": "male"},
+    }
+
+    headers := []string{"Name", "Age", "Gender"}
+    err := fileutil.WriteMapsToCsv(csvFilePath, records, false, ';', headers)
+
+    if err != nil {
+        log.Fatal(err)
+    }
+
+    content, err := fileutil.ReadCsvFile(csvFilePath, ';')
+
+    fmt.Println(content)
+
+    // Output:
+    // [[Name Age Gender] [Lili 22 female] [Jim 21 male]]
+}
+```
+
+### <span id="WriteBytesToFile">WriteBytesToFile</span>
+
+<p>Writes bytes to target file.</p>
+
+<b>Signature:</b>
+
+```go
+func WriteBytesToFile(filepath string, content []byte) error
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    filepath := "./bytes.txt"
+
+    file, err := os.Create(filepath)
+    if err != nil {
+        return
+    }
+
+    defer file.Close()
+
+    err = fileutil.WriteBytesToFile(filepath, []byte("hello"))
+    if err != nil {
+        return
+    }
+
+    content, err := fileutil.ReadFileToString(filepath)
+    if err != nil {
+        return
+    }
+
+    os.Remove(filepath)
+
+    fmt.Println(content)
+
+    // Output:
+    // hello
+}
+```
+
+### <span id="WriteStringToFile">WriteStringToFile</span>
+
+<p>Writes string to target file.</p>
+
+<b>Signature:</b>
+
+```go
+func WriteStringToFile(filepath string, content string, append bool) error
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    filepath := "./test.txt"
+
+    file, err := os.Create(filepath)
+    if err != nil {
+        return
+    }
+
+    defer file.Close()
+
+    err = fileutil.WriteStringToFile(filepath, "hello", true)
+    if err != nil {
+        return
+    }
+
+    content, err := fileutil.ReadFileToString(filepath)
+    if err != nil {
+        return
+    }
+
+    os.Remove(filepath)
+
+    fmt.Println(content)
+
+    // Output:
+    // hello
+}
+```
+
+### <span id="ReadFile">ReadFile</span>
+
+<p>Read File/URL</p>
+
+<b>Signature:</b>
+
+```go
+func ReadFile(path string) (reader io.ReadCloser, closeFn func(), err error) 
+```
+
+<b>Example:<span style="float:right;display:inline-block;"> </span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+   reader, fn, err := ReadFile("https://httpbin.org/robots.txt")
+    if err != nil {
+        return
+    }
+    defer fn()
+
+    dat, err := io.ReadAll(reader)
+    if err != nil {
+        return
+    }
+    fmt.Println(string(dat))
+    // Output:
+    // User-agent: *
+    // Disallow: /deny
+}
+```
--- a/docs/fileutil_zh-CN.md
+++ b/docs/fileutil_zh-CN.md
@@ -1,47 +1,61 @@
 # Fileutil
-fileutil包支持文件基本操作。
+
+fileutil 包支持文件基本操作。

 <div STYLE="page-break-after: always;"></div>

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/fileutil/file.go](https://github.com/duke-git/lancet/blob/main/fileutil/file.go)
+[https://github.com/duke-git/lancet/blob/v1/fileutil/file.go](https://github.com/duke-git/lancet/blob/v1/fileutil/file.go)

 <div STYLE="page-break-after: always;"></div>

 ## 用法:
+
 ```go
 import (
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )
 ```

 <div STYLE="page-break-after: always;"></div>

 ## 目录
- [ClearFile](#ClearFile)
- [CreateFile](#CreateFile)
- [CopyFile](#CopyFile)
- [FileMode](#FileMode)
- [MiMeType](#MiMeType)
- [IsExist](#IsExist)
- [IsLink](#IsLink)
- [IsDir](#IsDir)

- [ListFileNames](#ListFileNames)
- [RemoveFile](#RemoveFile)
- [ReadFileToString](#ReadFileToString)
- [ReadFileByLine](#ReadFileByLine)
- [Zip](#Zip)
- [UnZip](#UnZip)
+-   [ClearFile](#ClearFile)
+-   [CreateFile](#CreateFile)
+-   [CreateDir](#CreateDir)
+-   [CopyFile](#CopyFile)
+-   [FileMode](#FileMode)
+-   [MiMeType](#MiMeType)
+-   [IsExist](#IsExist)
+-   [IsLink](#IsLink)
+-   [IsDir](#IsDir)画
+-   [ListFileNames](#ListFileNames)
+-   [RemoveFile](#RemoveFile)
+-   [ReadFileToString](#ReadFileToString)
+-   [ReadFileByLine](#ReadFileByLine)
+-   [Zip](#Zip)
+-   [UnZip](#UnZip)
+-   [ZipAppendEntry](#ZipAppendEntry)
+-   [CurrentPath](#CurrentPath)
+-   [IsZipFile](#IsZipFile)
+-   [FileSize](#FileSize)
+-   [MTime](#MTime)
+-   [Sha](#Sha)
+-   [ReadCsvFile](#ReadCsvFile)
+-   [WriteCsvFile](#WriteCsvFile)
+-   [WriteMapsToCsv](#WriteMapsToCsv)
+-   [WriteStringToFile](#WriteStringToFile)
+-   [WriteBytesToFile](#WriteBytesToFile)
+-   [ReadFile](#ReadFile)

 <div STYLE="page-break-after: always;"></div>

 ## 文档

-
-
 ### <span id="ClearFile">ClearFile</span>
+
 <p>清空文件内容</p>

 <b>函数签名:</b>
@@ -49,6 +63,7 @@ import (
 ```go
 func ClearFile(path string) error
 ```
+
 <b>例子:</b>

 ```go
@@ -56,7 +71,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -67,14 +82,16 @@ func main() {
 }
 ```

-### <span id="CreateFile">CreateFile</span>
-<p>创建文件，创建成功返回true, 否则返回false</p>
+### <span id="CreateDir">CreateDir</span>
+
+<p>使用绝对路径创建嵌套目录，例如/a/, /a/b/</p>

 <b>函数签名:</b>

 ```go
-func CreateFile(path string) bool
+func CreateDir(absPath string) error
 ```
+
 <b>例子:</b>

 ```go
@@ -82,7 +99,33 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    err := fileutil.CreateDir("/a/")
+    fmt.Println(err)
+}
+```
+
+### <span id="CreateFile">CreateFile</span>
+
+<p>创建文件，创建成功返回true, 否则返回false</p>
+
+<b>函数签名:</b>
+
+```go
+func CreateFile(path string) bool
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -91,8 +134,8 @@ func main() {
 }
 ```

-
 ### <span id="CopyFile">CopyFile</span>
+
 <p>拷贝文件，会覆盖原有的拷贝文件</p>

 <b>函数签名:</b>
@@ -100,6 +143,7 @@ func main() {
 ```go
 func CopyFile(srcFilePath string, dstFilePath string) error
 ```
+
 <b>例子:</b>

 ```go
@@ -107,20 +151,19 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
    err := fileutil.CopyFile("./test.txt", "./test_copy.txt")
-	if err != nil {
-		fmt.Println(err)
-	}
+    if err != nil {
+        fmt.Println(err)
+    }
 }
 ```

-
-
 ### <span id="FileMode">FileMode</span>
+
 <p>获取文件mode信息</p>

 <b>函数签名:</b>
@@ -128,6 +171,7 @@ func main() {
 ```go
 func FileMode(path string) (fs.FileMode, error)
 ```
+
 <b>例子:</b>

 ```go
@@ -135,28 +179,28 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
    mode, err := fileutil.FileMode("./test.txt")
-	if err != nil {
-		fmt.Println(err)
-	}
+    if err != nil {
+        fmt.Println(err)
+    }
    fmt.Println(mode)
 }
 ```

-
-
 ### <span id="MiMeType">MiMeType</span>
+
 <p>获取文件mime类型, 'file'参数的类型必须是string或者*os.File</p>

 <b>函数签名:</b>

 ```go
-func MiMeType(file any) string
+func MiMeType(file interface{}) string
 ```
+
 <b>例子:</b>

 ```go
@@ -165,7 +209,7 @@ package main
 import (
    "fmt"
    "os"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -178,10 +222,8 @@ func main() {
 }
 ```

-
-
-
 ### <span id="IsExist">IsExist</span>
+
 <p>判断文件或目录是否存在</p>

 <b>函数签名:</b>
@@ -189,6 +231,7 @@ func main() {
 ```go
 func IsExist(path string) bool
 ```
+
 <b>例子:</b>

 ```go
@@ -196,7 +239,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -206,9 +249,8 @@ func main() {
 }
 ```

-
-
 ### <span id="IsLink">IsLink</span>
+
 <p>判断文件是否是符号链接</p>

 <b>函数签名:</b>
@@ -216,6 +258,7 @@ func main() {
 ```go
 func IsLink(path string) bool
 ```
+
 <b>例子:</b>

 ```go
@@ -223,7 +266,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -232,16 +275,16 @@ func main() {
 }
 ```

-
-
 ### <span id="IsDir">IsDir</span>
+
 <p>判断目录是否存在</p>

 <b>函数签名:</b>

 ```go
-func IsDir(path string) bool 
+func IsDir(path string) bool
 ```
+
 <b>例子:</b>

 ```go
@@ -249,7 +292,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -261,9 +304,8 @@ func main() {
 }
 ```

-
-
 ### <span id="ListFileNames">ListFileNames</span>
+
 <p>返回目录下所有文件名</p>

 <b>函数签名:</b>
@@ -271,6 +313,7 @@ func main() {
 ```go
 func ListFileNames(path string) ([]string, error)
 ```
+
 <b>例子:</b>

 ```go
@@ -278,7 +321,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
@@ -287,9 +330,8 @@ func main() {
 }
 ```

-
-
 ### <span id="RemoveFile">RemoveFile</span>
+
 <p>删除文件</p>

 <b>函数签名:</b>
@@ -297,6 +339,7 @@ func main() {
 ```go
 func RemoveFile(path string) error
 ```
+
 <b>例子:</b>

 ```go
@@ -304,19 +347,19 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
    err := fileutil.RemoveFile("./test.txt")
    if err != nil {
-		fmt.Println(err)
-	}
+        fmt.Println(err)
+    }
 }
 ```

-
 ### <span id="ReadFileToString">ReadFileToString</span>
+
 <p>读取文件内容并返回字符串</p>

 <b>函数签名:</b>
@@ -324,6 +367,7 @@ func main() {
 ```go
 func ReadFileToString(path string) (string, error)
 ```
+
 <b>例子:</b>

 ```go
@@ -332,24 +376,23 @@ package main
 import (
    "fmt"
    "os"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
    path := "./test.txt"
-	fileutil.CreateFile(path)
+    fileutil.CreateFile(path)

-	f, _ := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0777)
-	f.WriteString("hello world")
+    f, _ := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0777)
+    f.WriteString("hello world")

-	content, _ := fileutil.ReadFileToString(path)
+    content, _ := fileutil.ReadFileToString(path)
    fmt.Println(content) //hello world
 }
 ```

-
-
 ### <span id="ReadFileByLine">ReadFileByLine</span>
+
 <p>按行读取文件内容，返回字符串切片包含每一行</p>

 <b>函数签名:</b>
@@ -357,6 +400,7 @@ func main() {
 ```go
 func ReadFileByLine(path string)([]string, error)
 ```
+
 <b>例子:</b>

 ```go
@@ -365,25 +409,24 @@ package main
 import (
    "fmt"
    "os"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
    path := "./text.txt"
-	fileutil.CreateFile(path)
+    fileutil.CreateFile(path)

-	f, _ := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0777)
-	defer f.Close()
-	f.WriteString("hello\nworld")
+    f, _ := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0777)
+    defer f.Close()
+    f.WriteString("hello\nworld")

-	contents, _ := fileutil.ReadFileByLine(path)
+    contents, _ := fileutil.ReadFileByLine(path)
    fmt.Println(contents) //[]string{"hello", "world"}
 }
 ```

-
-
 ### <span id="Zip">Zip</span>
+
 <p>zip压缩文件, fpath参数可以是文件或目录</p>

 <b>函数签名:</b>
@@ -391,6 +434,7 @@ func main() {
 ```go
 func Zip(fpath string, destPath string) error
 ```
+
 <b>例子:</b>

 ```go
@@ -398,28 +442,27 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
-	err := fileutil.Zip("./test.txt", "./test.zip")
+    err := fileutil.Zip("./test.txt", "./test.zip")
    if err != nil {
        fmt.Println(err)
    }
 }
 ```

-
-
-
 ### <span id="UnZip">UnZip</span>
+
 <p>zip解压缩文件并保存在目录中</p>

-<b>Signature:</b>
+<b>函数签名:</b>

 ```go
 func UnZip(zipFile string, destPath string) error
 ```
+
 <b>例子:</b>

 ```go
@@ -427,18 +470,453 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/fileutil"
+    "github.com/duke-git/lancet/fileutil"
 )

 func main() {
-	err := fileutil.Zip("./test.zip", "./unzip/test.txt")
+    err := fileutil.Zip("./test.zip", "./unzip/test.txt")
    if err != nil {
        fmt.Println(err)
    }
 }
 ```

+### <span id="ZipAppendEntry">ZipAppendEntry</span>

+<p>通过将单个文件或目录追加到现有的zip文件</p>

+<b>函数签名:</b>

+```go
+func ZipAppendEntry(fpath string, destPath string) error
+```

+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    err := fileutil.ZipAppendEntry("./test.txt", "./test.zip")
+    if err != nil {
+        fmt.Println(err)
+    }
+}
+```
+
+### <span id="CurrentPath">CurrentPath</span>
+
+<p>返回当前位置的绝对路径。</p>
+
+<b>函数签名:</b>
+
+```go
+func CurrentPath() string
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    absPath := CurrentPath()
+    fmt.Println(absPath)
+}
+```
+
+### <span id="IsZipFile">IsZipFile</span>
+
+<p>判断文件是否是zip压缩文件。</p>
+
+<b>函数签名:</b>
+
+```go
+func IsZipFile(filepath string) bool
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    isZip := IsZipFile("./zipfile.zip")
+    fmt.Println(isZip)
+}
+```
+
+### <span id="FileSize">FileSize</span>
+
+<p>返回文件字节大小。</p>
+
+<b>函数签名:</b>
+
+```go
+func FileSize(path string) (int64, error)
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    size, err := fileutil.FileSize("./testdata/test.txt")
+
+    fmt.Println(size)
+    fmt.Println(err)
+
+    // Output:
+    // 20
+    // <nil>
+}
+```
+
+### <span id="MTime">MTime</span>
+
+<p>返回文件修改时间(unix timestamp).</p>
+
+<b>函数签名:</b>
+
+```go
+func MTime(filepath string) (int64, error)
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    mtime, err := fileutil.MTime("./testdata/test.txt")
+
+    fmt.Println(mtime)
+    fmt.Println(err)
+
+    // Output:
+    // 1682391110
+    // <nil>
+}
+```
+
+### <span id="Sha">Sha</span>
+
+<p>返回文件sha值，参数`shaType` 应传值为: 1, 256，512.</p>
+
+<b>函数签名:</b>
+
+```go
+func Sha(filepath string, shaType ...int) (string, error)
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    sha1, err := fileutil.Sha("./testdata/test.txt", 1)
+    sha256, _ := fileutil.Sha("./testdata/test.txt", 256)
+    sha512, _ := fileutil.Sha("./testdata/test.txt", 512)
+
+    fmt.Println(sha1)
+    fmt.Println(sha256)
+    fmt.Println(sha512)
+    fmt.Println(err)
+
+    // Output:
+    // dda3cf10c5a6ff6c6659a497bf7261b287af2bc7
+    // aa6d0a3fbc3442c228d606da09e0c1dc98c69a1cac3da1909199e0266171df35
+    // d22aba2a1b7a2e2f512756255cc1c3708905646920cb1eb95e45b531ba74774dbbb89baebf1f716220eb9cf4908f1cfc5b2a01267704d9a59f59d77cab609870
+    // <nil>
+}
+```
+
+### <span id="ReadCsvFile">ReadCsvFile</span>
+
+<p>读取csv文件内容到切片</p>
+
+<b>函数签名:</b>
+
+```go
+func ReadCsvFile(filepath string) ([][]string, error)
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    content, err := fileutil.ReadCsvFile("./testdata/test.csv")
+
+    fmt.Println(content)
+    fmt.Println(err)
+
+    // Output:
+    // [[Bob  12  male] [Duke  14  male] [Lucy  16  female]]
+    // <nil>
+}
+```
+
+### <span id="WriteCsvFile">WriteCsvFile</span>
+
+<p>向csv文件写入内容。</p>
+
+<b>函数签名:</b>
+
+```go
+func WriteCsvFile(filepath string, records [][]string, append bool) error
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    data := [][]string{
+        {"Lili", "22", "female"},
+        {"Jim", "21", "male"},
+    }
+    err := WriteCsvFile("./testdata/test2.csv", data, false)
+    fmt.Println(err)
+
+    content, _ := ReadCsvFile("./testdata/test2.csv")
+    fmt.Println(content)
+
+    // Output:
+    // <nil>
+    // [[Lili 22 female] [Jim 21 male]]
+}
+```
+
+### <span id="WriteMapsToCsv">WriteMapsToCsv</span>
+
+<p>将map切片写入csv文件中。</p>
+
+<b>函数签名:</b>
+
+```go
+// filepath: CSV文件路径。
+// records: 写入文件的map切片。map值必须为基本类型。会以map键的字母顺序写入。
+// appendToExistingFile: 是否为追加写模式。
+// delimiter: CSV文件分割符。
+// headers: CSV文件表头顺序（需要与map key保持一致)，不指定时按字母排序。
+func WriteMapsToCsv(filepath string, records []map[string]interface{}, appendToExistingFile bool, delimiter rune, headers ...[]string) error
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    fpath := "./test.csv"
+    fileutil.CreateFile(fpath)
+
+    f, _ := os.OpenFile(fpath, os.O_WRONLY|os.O_TRUNC, 0777)
+    defer f.Close()
+
+    records := []map[string]interface{}{
+        {"Name": "Lili", "Age": "22", "Gender": "female"},
+        {"Name": "Jim", "Age": "21", "Gender": "male"},
+    }
+
+    headers := []string{"Name", "Age", "Gender"}
+    err := fileutil.WriteMapsToCsv(csvFilePath, records, false, ';', headers)
+
+    if err != nil {
+        log.Fatal(err)
+    }
+
+    content, err := fileutil.ReadCsvFile(csvFilePath, ';')
+
+    fmt.Println(content)
+
+    // Output:
+    // [[Name Age Gender] [Lili 22 female] [Jim 21 male]]
+}
+```
+
+### <span id="WriteBytesToFile">WriteBytesToFile</span>
+
+<p>将bytes写入文件。</p>
+
+<b>函数签名:</b>
+
+```go
+func WriteBytesToFile(filepath string, content []byte) error
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    filepath := "./bytes.txt"
+
+    file, err := os.Create(filepath)
+    if err != nil {
+        return
+    }
+
+    defer file.Close()
+
+    err = fileutil.WriteBytesToFile(filepath, []byte("hello"))
+    if err != nil {
+        return
+    }
+
+    content, err := fileutil.ReadFileToString(filepath)
+    if err != nil {
+        return
+    }
+
+    os.Remove(filepath)
+
+    fmt.Println(content)
+
+    // Output:
+    // hello
+}
+```
+
+### <span id="WriteStringToFile">WriteStringToFile</span>
+
+<p>将字符串写入文件。</p>
+
+<b>函数签名:</b>
+
+```go
+func WriteStringToFile(filepath string, content string, append bool) error
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+    filepath := "./test.txt"
+
+    file, err := os.Create(filepath)
+    if err != nil {
+        return
+    }
+
+    defer file.Close()
+
+    err = fileutil.WriteStringToFile(filepath, "hello", true)
+    if err != nil {
+        return
+    }
+
+    content, err := fileutil.ReadFileToString(filepath)
+    if err != nil {
+        return
+    }
+
+    os.Remove(filepath)
+
+    fmt.Println(content)
+
+    // Output:
+    // hello
+}
+```
+
+### <span id="ReadFile">ReadFile</span>
+
+<p>读取文件或者URL</p>
+
+<b>函数签名:</b>
+
+```go
+func ReadFile(path string) (reader io.ReadCloser, closeFn func(), err error)
+```
+
+<b>示例:<span style="float:right;display:inline-block;"></span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/fileutil"
+)
+
+func main() {
+   reader, fn, err := ReadFile("https://httpbin.org/robots.txt")
+    if err != nil {
+        return
+    }
+    defer fn()
+
+    dat, err := io.ReadAll(reader)
+    if err != nil {
+        return
+    }
+    fmt.Println(string(dat))
+    // Output:
+    // User-agent: *
+    // Disallow: /deny
+}
+```
--- a/docs/formatter.md
+++ b/docs/formatter.md
@@ -1,41 +1,50 @@
 # Formatter
+
 formatter contains some functions for data formatting.

 <div STYLE="page-break-after: always;"></div>

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/formatter/formatter.go](https://github.com/duke-git/lancet/blob/main/formatter/formatter.go)
+[https://github.com/duke-git/lancet/blob/v1/formatter/formatter.go](https://github.com/duke-git/lancet/blob/v1/formatter/formatter.go)

 <div STYLE="page-break-after: always;"></div>

 ## Usage:
+
 ```go
 import (
-    "github.com/duke-git/lancet/v2/formatter"
+    "github.com/duke-git/lancet/formatter"
 )
 ```

 <div STYLE="page-break-after: always;"></div>

 ## Index
- [Comma](#Comma)
+
+-   [Comma](#Comma)
+-   [Pretty](#Pretty)
+-   [PrettyToWriter](#PrettyToWriter)
+-   [DecimalBytes](#DecimalBytes)
+-   [BinaryBytes](#BinaryBytes)
+-   [ParseDecimalBytes](#ParseDecimalBytes)
+-   [ParseBinaryBytes](#ParseBinaryBytes)

 <div STYLE="page-break-after: always;"></div>

 ## Documentation

-
-
 ### <span id="Comma">Comma</span>
+
 <p>Add comma to number by every 3 numbers from right. ahead by symbol char.
 Param should be number or numberic string.</p>

 <b>Signature:</b>

 ```go
-func Comma(v any, symbol string) string
+func Comma(value interface{}, prefixSymbol string) string
 ```
+
 <b>Example:</b>

 ```go
@@ -43,7 +52,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/formatter"
+    "github.com/duke-git/lancet/formatter"
 )

 func main() {
@@ -51,3 +60,241 @@ func main() {
    fmt.Println(formatter.Comma(12345.67, "¥")) // "¥12,345.67"
 }
 ```
+
+### <span id="Pretty">Pretty</span>
+
+<p>Pretty data to JSON string.</p>
+
+<b>Signature:</b>
+
+```go
+func Pretty(v interface{}) (string, error)
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/formatter"
+)
+
+func main() {
+    result1, _ := formatter.Pretty([]string{"a", "b", "c"})
+    result2, _ := formatter.Pretty(map[string]int{"a": 1})
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+
+    // Output:
+    // [
+    //     "a",
+    //     "b",
+    //     "c"
+    // ]
+    // {
+    //     "a": 1
+    // }
+}
+```
+
+### <span id="PrettyToWriter">PrettyToWriter</span>
+
+<p>Pretty encode data to writer.</p>
+
+<b>Signature:</b>
+
+```go
+func PrettyToWriter(v interface{}, out io.Writer) error
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/formatter"
+)
+
+func main() {
+    type User struct {
+        Name string `json:"name"`
+        Aage uint   `json:"age"`
+    }
+    user := User{Name: "King", Aage: 10000}
+
+    buf := &bytes.Buffer{}
+    err := formatter.PrettyToWriter(user, buf)
+
+    fmt.Println(buf)
+    fmt.Println(err)
+
+    // Output:
+    // {
+    //     "name": "King",
+    //     "age": 10000
+    // }
+    //
+    // <nil>
+}
+```
+
+### <span id="DecimalBytes">DecimalBytes</span>
+
+<p>Returns a human readable byte size under decimal standard (base 1000). The precision parameter specifies the number of digits after the decimal point, which is 4 for default.</p>
+
+<b>Signature:</b>
+
+```go
+func DecimalBytes(size float64, precision ...int) string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/formatter"
+)
+
+func main() {
+    result1 := formatter.DecimalBytes(1000)
+    result2 := formatter.DecimalBytes(1024)
+    result3 := formatter.DecimalBytes(1234567)
+    result4 := formatter.DecimalBytes(1234567, 3)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+
+    // Output:
+    // 1KB
+    // 1.024KB
+    // 1.2346MB
+    // 1.235MB
+}
+```
+
+### <span id="BinaryBytes">BinaryBytes</span>
+
+<p>Returns a human readable byte size under binary standard (base 1024). The precision parameter specifies the number of digits after the decimal point, which is 4 for default.</p>
+
+<b>Signature:</b>
+
+```go
+func BinaryBytes(size float64, precision ...int) string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/formatter"
+)
+
+func main() {
+    result1 := formatter.BinaryBytes(1024)
+    result2 := formatter.BinaryBytes(1024 * 1024)
+    result3 := formatter.BinaryBytes(1234567)
+    result4 := formatter.BinaryBytes(1234567, 2)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+
+    // Output:
+    // 1KiB
+    // 1MiB
+    // 1.1774MiB
+    // 1.18MiB
+}
+```
+
+### <span id="ParseDecimalBytes">ParseDecimalBytes</span>
+
+<p>Returns the human readable bytes size string into the amount it represents(base 1000).</p>
+
+<b>Signature:</b>
+
+```go
+func ParseDecimalBytes(size string) (uint64, error)
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/formatter"
+)
+
+func main() {
+    result1, _ := formatter.ParseDecimalBytes("12")
+    result2, _ := formatter.ParseDecimalBytes("12k")
+    result3, _ := formatter.ParseDecimalBytes("12 Kb")
+    result4, _ := formatter.ParseDecimalBytes("12.2 kb")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+
+    // Output:
+    // 12
+    // 12000
+    // 12000
+    // 12200
+}
+```
+
+### <span id="ParseBinaryBytes">ParseBinaryBytes</span>
+
+<p>Returns the human readable bytes size string into the amount it represents(base 1024).</p>
+
+<b>Signature:</b>
+
+```go
+func ParseBinaryBytes(size string) (uint64, error)
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/formatter"
+)
+
+func main() {
+    result1, _ := formatter.ParseBinaryBytes("12")
+    result2, _ := formatter.ParseBinaryBytes("12ki")
+    result3, _ := formatter.ParseBinaryBytes("12 KiB")
+    result4, _ := formatter.ParseBinaryBytes("12.2 kib")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+
+    // Output:
+    // 12
+    // 12288
+    // 12288
+    // 12492
+}
+```
--- a/docs/formatter_zh-CN.md
+++ b/docs/formatter_zh-CN.md
@@ -1,40 +1,49 @@
 # Formatter
-formatter格式化器包含一些数据格式化处理方法。
+
+formatter 格式化器包含一些数据格式化处理方法。

 <div STYLE="page-break-after: always;"></div>

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/formatter/formatter.go](https://github.com/duke-git/lancet/blob/main/formatter/formatter.go)
+[https://github.com/duke-git/lancet/blob/v1/formatter/formatter.go](https://github.com/duke-git/lancet/blob/v1/formatter/formatter.go)

 <div STYLE="page-break-after: always;"></div>

 ## 用法:
+
 ```go
 import (
-    "github.com/duke-git/lancet/v2/formatter"
+    "github.com/duke-git/lancet/formatter"
 )
 ```

 <div STYLE="page-break-after: always;"></div>

 ## 目录
- [Comma](#Comma)
+
+-   [Comma](#Comma)
+-   [Pretty](#Pretty)
+-   [PrettyToWriter](#PrettyToWriter)
+-   [DecimalBytes](#DecimalBytes)
+-   [BinaryBytes](#BinaryBytes)
+-   [ParseDecimalBytes](#ParseDecimalBytes)
+-   [ParseBinaryBytes](#ParseBinaryBytes)

 <div STYLE="page-break-after: always;"></div>

 ## 文档

-
-
 ### <span id="Comma">Comma</span>
+
 <p>用逗号每隔3位分割数字/字符串，签名添加符号。参数必须是数字或者可以转为数字的字符串</p>

 <b>函数签名:</b>

 ```go
-func Comma(v any, symbol string) string
+func Comma(v interface{}, prefixSymbol string) string
 ```
+
 <b>例子:</b>

 ```go
@@ -42,7 +51,7 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/formatter"
+    "github.com/duke-git/lancet/formatter"
 )

 func main() {
@@ -50,3 +59,241 @@ func main() {
    fmt.Println(formatter.Comma(12345.67, "¥")) // "¥12,345.67"
 }
 ```
+
+### <span id="Pretty">Pretty</span>
+
+<p>返回pretty JSON字符串.</p>
+
+<b>函数签名:</b>
+
+```go
+func Pretty(v interface{}) (string, error)
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/formatter"
+)
+
+func main() {
+    result1, _ := formatter.Pretty([]string{"a", "b", "c"})
+    result2, _ := formatter.Pretty(map[string]int{"a": 1})
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+
+    // Output:
+    // [
+    //     "a",
+    //     "b",
+    //     "c"
+    // ]
+    // {
+    //     "a": 1
+    // }
+}
+```
+
+### <span id="PrettyToWriter">PrettyToWriter</span>
+
+<p>Pretty encode数据到writer。</p>
+
+<b>函数签名:</b>
+
+```go
+func PrettyToWriter(v interface{}, out io.Writer) error
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/formatter"
+)
+
+func main() {
+    type User struct {
+        Name string `json:"name"`
+        Aage uint   `json:"age"`
+    }
+    user := User{Name: "King", Aage: 10000}
+
+    buf := &bytes.Buffer{}
+    err := formatter.PrettyToWriter(user, buf)
+
+    fmt.Println(buf)
+    fmt.Println(err)
+
+    // Output:
+    // {
+    //     "name": "King",
+    //     "age": 10000
+    // }
+    //
+    // <nil>
+}
+```
+
+### <span id="DecimalBytes">DecimalBytes</span>
+
+<p>返回十进制标准（以1000为基数）下的可读字节单位字符串。precision参数指定小数点后的位数，默认为4。</p>
+
+<b>函数签名:</b>
+
+```go
+func DecimalBytes(size float64, precision ...int) string
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/formatter"
+)
+
+func main() {
+    result1 := formatter.DecimalBytes(1000)
+    result2 := formatter.DecimalBytes(1024)
+    result3 := formatter.DecimalBytes(1234567)
+    result4 := formatter.DecimalBytes(1234567, 3)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+
+    // Output:
+    // 1KB
+    // 1.024KB
+    // 1.2346MB
+    // 1.235MB
+}
+```
+
+### <span id="BinaryBytes">BinaryBytes</span>
+
+<p>返回binary标准（以1024为基数）下的可读字节单位字符串。precision参数指定小数点后的位数，默认为4。</p>
+
+<b>函数签名:</b>
+
+```go
+func BinaryBytes(size float64, precision ...int) string
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/formatter"
+)
+
+func main() {
+    result1 := formatter.BinaryBytes(1024)
+    result2 := formatter.BinaryBytes(1024 * 1024)
+    result3 := formatter.BinaryBytes(1234567)
+    result4 := formatter.BinaryBytes(1234567, 2)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+
+    // Output:
+    // 1KiB
+    // 1MiB
+    // 1.1774MiB
+    // 1.18MiB
+}
+```
+
+### <span id="ParseDecimalBytes">ParseDecimalBytes</span>
+
+<p>将字节单位字符串转换成其所表示的字节数（以1000为基数）。</p>
+
+<b>函数签名:</b>
+
+```go
+func ParseDecimalBytes(size string) (uint64, error)
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/formatter"
+)
+
+func main() {
+    result1, _ := formatter.ParseDecimalBytes("12")
+    result2, _ := formatter.ParseDecimalBytes("12k")
+    result3, _ := formatter.ParseDecimalBytes("12 Kb")
+    result4, _ := formatter.ParseDecimalBytes("12.2 kb")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+
+    // Output:
+    // 12
+    // 12000
+    // 12000
+    // 12200
+}
+```
+
+### <span id="ParseBinaryBytes">ParseBinaryBytes</span>
+
+<p>将字节单位字符串转换成其所表示的字节数（以1024为基数）。</p>
+
+<b>函数签名:</b>
+
+```go
+func ParseBinaryBytes(size string) (uint64, error)
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/formatter"
+)
+
+func main() {
+    result1, _ := formatter.ParseBinaryBytes("12")
+    result2, _ := formatter.ParseBinaryBytes("12ki")
+    result3, _ := formatter.ParseBinaryBytes("12 KiB")
+    result4, _ := formatter.ParseBinaryBytes("12.2 kib")
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+
+    // Output:
+    // 12
+    // 12288
+    // 12288
+    // 12492
+}
+```
--- a/docs/function.md
+++ b/docs/function.md
@@ -1,47 +1,54 @@
 # Function
+
 Package function can control the flow of function execution and support part of functional programming.

 <div STYLE="page-break-after: always;"></div>

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/function/function.go](https://github.com/duke-git/lancet/blob/main/function/function.go)
- [https://github.com/duke-git/lancet/blob/main/function/watcher.go](https://github.com/duke-git/lancet/blob/main/function/watcher.go)
+[https://github.com/duke-git/lancet/blob/v1/function/function.go](https://github.com/duke-git/lancet/blob/v1/function/function.go)
+[https://github.com/duke-git/lancet/blob/v1/function/watcher.go](https://github.com/duke-git/lancet/blob/v1/function/watcher.go)

 <div STYLE="page-break-after: always;"></div>

 ## Usage:
+
 ```go
 import (
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )
 ```

 <div STYLE="page-break-after: always;"></div>

 ## Index
- [After](#After)
- [Before](#Before)
- [Curry](#Curry)
- [Compose](#Compose)
- [Debounced](#Debounced)
- [Delay](#Delay)
- [Watcher](#Watcher)
+
+-   [After](#After)
+-   [Before](#Before)
+-   [Curry](#Curry)
+-   [Compose](#Compose)
+-   [Debounce](#Debounce)
+-   [Debounced<sup>deprecated</sup>](#Debounced)
+-   [Throttle](#Throttle)
+-   [Delay](#Delay)
+-   [Pipeline](#Pipeline)
+-   [Schedule](#Schedule)
+-   [Watcher](#Watcher)

 <div STYLE="page-break-after: always;"></div>

 ## Documentation

-
-
 ### <span id="After">After</span>
+
 <p>Creates a function that invokes given func once it's called n or more times.</p>

 <b>Signature:</b>

 ```go
-func After(n int, fn any) func(args ...any) []reflect.Value
+func After(n int, fn interface{}) func(args ...interface{}) []reflect.Value
 ```
+
 <b>Example:</b>

 ```go
@@ -49,37 +56,35 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
-	arr := []string{"a", "b"}
-	f := function.After(len(arr), func(i int) int {
-		fmt.Println("last print")
-		return i
-	})
+    arr := []string{"a", "b"}
+    f := function.After(len(arr), func(i int) int {
+        fmt.Println("last print")
+        return i
+    })

-	type cb func(args ...any) []reflect.Value
-	print := func(i int, s string, fn cb) {
-		fmt.Printf("arr[%d] is %s \n", i, s)
-		fn(i)
-	}
+    type cb func(args ...interface{}) []reflect.Value
+    print := func(i int, s string, fn cb) {
+        fmt.Printf("arr[%d] is %s \n", i, s)
+        fn(i)
+    }

-	fmt.Println("arr is", arr)
-	for i := 0; i < len(arr); i++ {
-		print(i, arr[i], f)
-	}
+    fmt.Println("arr is", arr)
+    for i := 0; i < len(arr); i++ {
+        print(i, arr[i], f)
+    }

    //output:
    // arr is [a b]
-    // arr[0] is a 
-    // arr[1] is b 
+    // arr[0] is a
+    // arr[1] is b
    // last print
 }
 ```

-
-
 ### <span id="Before">Before</span>

 <p>creates a function that invokes func once it's called less than n times.</p>
@@ -87,8 +92,9 @@ func main() {
 <b>Signature:</b>

 ```go
-func Before(n int, fn any) func(args ...any) []reflect.Value
+func Before(n int, fn interface{}) func(args ...interface{}) []reflect.Value
 ```
+
 <b>Example:</b>

 ```go
@@ -96,36 +102,34 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
-    "github.com/duke-git/lancet/v2/internal"
+    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/internal"
 )

 func main() {
    assert := internal.NewAssert(t, "TestBefore")

-	arr := []string{"a", "b", "c", "d", "e"}
-	f := function.Before(3, func(i int) int {
-		return i
-	})
+    arr := []string{"a", "b", "c", "d", "e"}
+    f := function.Before(3, func(i int) int {
+        return i
+    })

-	var res []int64
-	type cb func(args ...any) []reflect.Value
-	appendStr := func(i int, s string, fn cb) {
-		v := fn(i)
-		res = append(res, v[0].Int())
-	}
+    var res []int64
+    type cb func(args ...interface{}) []reflect.Value
+    appendStr := func(i int, s string, fn cb) {
+        v := fn(i)
+        res = append(res, v[0].Int())
+    }

-	for i := 0; i < len(arr); i++ {
-		appendStr(i, arr[i], f)
-	}
+    for i := 0; i < len(arr); i++ {
+        appendStr(i, arr[i], f)
+    }

-	expected := []int64{0, 1, 2, 2, 2}
-	assert.Equal(expected, res)
+    expected := []int64{0, 1, 2, 2, 2}
+    assert.Equal(expected, res)
 }
 ```

-
-
 ### <span id="Curry">Curry</span>

 <p>Make a curry function.</p>
@@ -133,9 +137,10 @@ func main() {
 <b>Signature:</b>

 ```go
-type Fn func(...any) any
-func (f Fn) Curry(i any) func(...any) any
+type Fn func(...interface{}) interface{}
+func (f Fn) Curry(i interface{}) func(...interface{}) interface{}
 ```
+
 <b>Example:</b>

 ```go
@@ -143,24 +148,22 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
    add := func(a, b int) int {
-		return a + b
-	}
-	var addCurry function.Fn = func(values ...any) any {
-		return add(values[0].(int), values[1].(int))
-	}
-	add1 := addCurry.Curry(1)
-	result := add1(2)
+        return a + b
+    }
+    var addCurry function.Fn = func(values ...interface{}) interface{} {
+        return add(values[0].(int), values[1].(int))
+    }
+    add1 := addCurry.Curry(1)
+    result := add1(2)
    fmt.Println(result) //3
 }
 ```

-
-
 ### <span id="Compose">Compose</span>

 <p>Compose the function list from right to left, then return the composed function.</p>
@@ -168,8 +171,9 @@ func main() {
 <b>Signature:</b>

 ```go
-func Compose(fnList ...func(...any) any) func(...any) any
+func Compose(fnList ...func(...interface{}) interface{}) func(...interface{}) interface{}
 ```
+
 <b>Example:</b>

 ```go
@@ -177,35 +181,34 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
-    add1 := func(v ...any) any {
-		return v[0].(int) + 1
-	}
-    add2 := func(v ...any) any {
-		return v[0].(int) + 2
-	}
+    add1 := func(v ...interface{}) interface{} {
+        return v[0].(int) + 1
+    }
+    add2 := func(v ...interface{}) interface{} {
+        return v[0].(int) + 2
+    }

    add3 := function.Compose(add1, add2)
-	result := add3(1)
+    result := add3(1)

    fmt.Println(result) //4
 }
 ```

-
-
 ### <span id="Debounced">Debounced</span>

-<p>Creates a debounced function that delays invoking fn until after wait duration have elapsed since the last time the debounced function was invoked.</p>
+<p>Creates a debounced function that delays invoking fn until after wait duration have elapsed since the last time the debounced function was invoked. This function is deprecated. use Debounce instead.</p>

 <b>Signature:</b>

 ```go
 func Debounced(fn func(), duration time.Duration) func()
 ```
+
 <b>Example:</b>

 ```go
@@ -213,31 +216,76 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
    count := 0
-	add := func() {
-		count++
-	}
+    add := func() {
+        count++
+    }

-	debouncedAdd := function.Debounced(add, 50*time.Microsecond)
-	function.debouncedAdd()
-	function.debouncedAdd()
-	function.debouncedAdd()
-	function.debouncedAdd()
+    debouncedAdd := function.Debounced(add, 50*time.Microsecond)
+    function.debouncedAdd()
+    function.debouncedAdd()
+    function.debouncedAdd()
+    function.debouncedAdd()

-	time.Sleep(100 * time.Millisecond)
-	fmt.Println(count) //1
+    time.Sleep(100 * time.Millisecond)
+    fmt.Println(count) //1

-	function.debouncedAdd()
-	time.Sleep(100 * time.Millisecond)
-	fmt.Println(count) //2
+    function.debouncedAdd()
+    time.Sleep(100 * time.Millisecond)
+    fmt.Println(count) //2
 }
 ```

+### <span id="Debounce">Debounce</span>

+<p>Creates a debounced version of the provided function. The debounced function will only invoke the original function after the specified delay has passed since the last time it was invoked. It also supports canceling the debounce.</p>
+
+<b>Signature:</b>
+
+```go
+func Debounce(fn func(), delay time.Duration) (debouncedFn func(), cancelFn func())
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/function"
+)
+
+func main() {
+    callCount := 0
+    fn := func() {
+        callCount++
+    }
+
+    debouncedFn, _ := function.Debounce(fn, 500*time.Millisecond)
+
+    for i := 0; i < 10; i++ {
+        debouncedFn()
+        time.Sleep(50 * time.Millisecond)
+    }
+
+    time.Sleep(1 * time.Second)
+    fmt.Println(callCount)
+
+    debouncedFn()
+
+    time.Sleep(1 * time.Second)
+    fmt.Println(callCount)
+
+    // Output:
+    // 1
+    // 2
+}
+```

 ### <span id="Delay">Delay</span>

@@ -246,8 +294,9 @@ func main() {
 <b>Signature:</b>

 ```go
-func Delay(delay time.Duration, fn any, args ...any)
+func Delay(delay time.Duration, fn interface{}, args ...interface{})
 ```
+
 <b>Example:</b>

 ```go
@@ -255,18 +304,58 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
-	var print = func(s string) {
-		fmt.Println(count) //test delay
-	}
-	function.Delay(2*time.Second, print, "test delay")
+    var print = func(s string) {
+        fmt.Println(count) //test delay
+    }
+    function.Delay(2*time.Second, print, "test delay")
 }
 ```

+### <span id="Throttle">Throttle</span>

+<p>Creates a throttled version of the provided function. The returned function guarantees that it will only be invoked at most once per interval.</p>
+
+<b>Signature:</b>
+
+```go
+func Throttle(fn func(), interval time.Duration) func()
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/function"
+)
+
+func main() {
+    callCount := 0
+
+    fn := func() {
+        callCount++
+    }
+
+    throttledFn := function.Throttle(fn, 1*time.Second)
+
+    for i := 0; i < 5; i++ {
+        throttledFn()
+    }
+
+    time.Sleep(1 * time.Second)
+
+    fmt.Println(callCount)
+
+    // Output:
+    // 1
+}
+```

 ### <span id="Schedule">Schedule</span>

@@ -275,8 +364,9 @@ func main() {
 <b>Signature:</b>

 ```go
-func Schedule(d time.Duration, fn any, args ...any) chan bool
+func Schedule(d time.Duration, fn interface{}, args ...interface{}) chan bool
 ```
+
 <b>Example:</b>

 ```go
@@ -284,24 +374,65 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
    var res []string
-	appendStr := func(s string) {
-		res = append(res, s)
-	}
+    appendStr := func(s string) {
+        res = append(res, s)
+    }

-	stop := function.Schedule(1*time.Second, appendStr, "*")
-	time.Sleep(5 * time.Second)
-	close(stop)
+    stop := function.Schedule(1*time.Second, appendStr, "*")
+    time.Sleep(5 * time.Second)
+    close(stop)

-	fmt.Println(res) //[* * * * *]
+    fmt.Println(res) //[* * * * *]
 }
 ```

+### <span id="Pipeline">Pipeline</span>

+<p>Pipeline takes a list of functions and returns a function whose param will be passed into
+the functions one by one.</p>
+
+<b>Signature:</b>
+
+```go
+func Pipeline(funcs ...func(interface{}) interface{}) func(interface{}) interface{}
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/function"
+)
+
+func main() {
+    addOne := func(x interface{}) interface{} {
+        return x.(int) + 1
+    }
+    double := func(x interface{}) interface{} {
+        return 2 * x.(int)
+    }
+    square := func(x interface{}) interface{} {
+        return x.(int) * x.(int)
+    }
+
+    f := function.Pipeline(addOne, double, square)
+
+    result := fn(2)
+
+    fmt.Println(result)
+
+    // Output:
+    // 36
+}
+```

 ### <span id="Watcher">Watcher</span>

@@ -311,15 +442,16 @@ func main() {

 ```go
 type Watcher struct {
-	startTime int64
-	stopTime  int64
-	excuting  bool
+    startTime int64
+    stopTime  int64
+    excuting  bool
 }
 func (w *Watcher) Start() //start the watcher
 func (w *Watcher) Stop() //stop the watcher
 func (w *Watcher) Reset() //reset the watcher
 func (w *Watcher) GetElapsedTime() time.Duration //get the elapsed time of function execution
 ```
+
 <b>Example:</b>

 ```go
@@ -327,38 +459,35 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
    w := &function.Watcher{}
-	w.Start()
+    w.Start()

-	longRunningTask()
+    longRunningTask()

-	fmt.Println(w.excuting) //true
+    fmt.Println(w.excuting) //true

-	w.Stop()
+    w.Stop()

-	eapsedTime := w.GetElapsedTime().Milliseconds()
-	fmt.Println(eapsedTime)
+    eapsedTime := w.GetElapsedTime().Milliseconds()
+    fmt.Println(eapsedTime)

-	w.Reset()
+    w.Reset()

-	fmt.Println(w.excuting) //false
+    fmt.Println(w.excuting) //false

-	fmt.Println(w.startTime) //0
-	fmt.Println(w.stopTime) //0
+    fmt.Println(w.startTime) //0
+    fmt.Println(w.stopTime) //0
 }

 func longRunningTask() {
-	var slice []int64
-	for i := 0; i < 10000000; i++ {
-		slice = append(slice, int64(i))
-	}
+    var slice []int64
+    for i := 0; i < 10000000; i++ {
+        slice = append(slice, int64(i))
+    }
 }

 ```
-
-
-
--- a/docs/function_zh-CN.md
+++ b/docs/function_zh-CN.md
@@ -1,47 +1,54 @@
 # Function
-function函数包控制函数执行流程，包含部分函数式编程。
+
+function 函数包控制函数执行流程，包含部分函数式编程。

 <div STYLE="page-break-after: always;"></div>

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/function/function.go](https://github.com/duke-git/lancet/blob/main/function/function.go)
- [https://github.com/duke-git/lancet/blob/main/function/watcher.go](https://github.com/duke-git/lancet/blob/main/function/watcher.go)
+[https://github.com/duke-git/lancet/blob/v1/function/function.go](https://github.com/duke-git/lancet/blob/v1/function/function.go)
+[https://github.com/duke-git/lancet/blob/v1/function/watcher.go](https://github.com/duke-git/lancet/blob/v1/function/watcher.go)

 <div STYLE="page-break-after: always;"></div>

 ## 用法:
+
 ```go
 import (
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )
 ```

 <div STYLE="page-break-after: always;"></div>

 ## 目录
- [After](#After)
- [Before](#Before)
- [Curry](#Curry)
- [Compose](#Compose)
- [Debounced](#Debounced)
- [Delay](#Delay)
- [Watcher](#Watcher)
+
+-   [After](#After)
+-   [Before](#Before)
+-   [Curry](#Curry)
+-   [Compose](#Compose)
+-   [Debounce](#Debounce)
+-   [Debounced<sup>deprecated</sup>](#Debounced)
+-   [Throttle](#Throttle)
+-   [Delay](#Delay)
+-   [Pipeline](#Pipeline)
+-   [Schedule](#Schedule)
+-   [Watcher](#Watcher)

 <div STYLE="page-break-after: always;"></div>

 ## 文档

-
-
 ### <span id="After">After</span>
+
 <p>创建一个函数，当他被调用n或更多次之后将马上触发fn</p>

 <b>函数签名:</b>

 ```go
-func After(n int, fn any) func(args ...any) []reflect.Value
+func After(n int, fn interface{}) func(args ...interface{}) []reflect.Value
 ```
+
 <b>例子:</b>

 ```go
@@ -49,37 +56,35 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
-	arr := []string{"a", "b"}
-	f := function.After(len(arr), func(i int) int {
-		fmt.Println("last print")
-		return i
-	})
+    arr := []string{"a", "b"}
+    f := function.After(len(arr), func(i int) int {
+        fmt.Println("last print")
+        return i
+    })

-	type cb func(args ...any) []reflect.Value
-	print := func(i int, s string, fn cb) {
-		fmt.Printf("arr[%d] is %s \n", i, s)
-		fn(i)
-	}
+    type cb func(args ...interface{}) []reflect.Value
+    print := func(i int, s string, fn cb) {
+        fmt.Printf("arr[%d] is %s \n", i, s)
+        fn(i)
+    }

-	fmt.Println("arr is", arr)
-	for i := 0; i < len(arr); i++ {
-		print(i, arr[i], f)
-	}
+    fmt.Println("arr is", arr)
+    for i := 0; i < len(arr); i++ {
+        print(i, arr[i], f)
+    }

    //output:
    // arr is [a b]
-    // arr[0] is a 
-    // arr[1] is b 
+    // arr[0] is a
+    // arr[1] is b
    // last print
 }
 ```

-
-
 ### <span id="Before">Before</span>

 <p>创建一个函数，调用次数不超过n次，之后再调用这个函数，将返回一次最后调用fn的结果</p>
@@ -87,8 +92,9 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Before(n int, fn any) func(args ...any) []reflect.Value
+func Before(n int, fn interface{}) func(args ...interface{}) []reflect.Value
 ```
+
 <b>例子:</b>

 ```go
@@ -96,36 +102,34 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
-    "github.com/duke-git/lancet/v2/internal"
+    "github.com/duke-git/lancet/function"
+    "github.com/duke-git/lancet/internal"
 )

 func main() {
-	assert := internal.NewAssert(t, "TestBefore")
+    assert := internal.NewAssert(t, "TestBefore")

-	arr := []string{"a", "b", "c", "d", "e"}
-	f := function.Before(3, func(i int) int {
-		return i
-	})
+    arr := []string{"a", "b", "c", "d", "e"}
+    f := function.Before(3, func(i int) int {
+        return i
+    })

-	var res []int64
-	type cb func(args ...any) []reflect.Value
-	appendStr := func(i int, s string, fn cb) {
-		v := fn(i)
-		res = append(res, v[0].Int())
-	}
+    var res []int64
+    type cb func(args ...interface{}) []reflect.Value
+    appendStr := func(i int, s string, fn cb) {
+        v := fn(i)
+        res = append(res, v[0].Int())
+    }

-	for i := 0; i < len(arr); i++ {
-		appendStr(i, arr[i], f)
-	}
+    for i := 0; i < len(arr); i++ {
+        appendStr(i, arr[i], f)
+    }

-	expected := []int64{0, 1, 2, 2, 2}
-	assert.Equal(expected, res)
+    expected := []int64{0, 1, 2, 2, 2}
+    assert.Equal(expected, res)
 }
 ```

-
-
 ### <span id="Curry">Curry</span>

 <p>创建一个柯里化的函数</p>
@@ -133,9 +137,10 @@ func main() {
 <b>函数签名:</b>

 ```go
-type Fn func(...any) any
-func (f Fn) Curry(i any) func(...any) any
+type Fn func(...interface{}) interface{}
+func (f Fn) Curry(i interface{}) func(...interface{}) interface{}
 ```
+
 <b>例子:</b>

 ```go
@@ -143,24 +148,22 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
-	add := func(a, b int) int {
-		return a + b
-	}
-	var addCurry function.Fn = func(values ...any) any {
-		return add(values[0].(int), values[1].(int))
-	}
-	add1 := addCurry.Curry(1)
-	result := add1(2)
-	fmt.Println(result) //3
+    add := func(a, b int) int {
+        return a + b
+    }
+    var addCurry function.Fn = func(values ...interface{}) interface{} {
+        return add(values[0].(int), values[1].(int))
+    }
+    add1 := addCurry.Curry(1)
+    result := add1(2)
+    fmt.Println(result) //3
 }
 ```

-
-
 ### <span id="Compose">Compose</span>

 <p>从右至左组合函数列表fnList， 返回组合后的函数</p>
@@ -168,8 +171,9 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Compose(fnList ...func(...any) any) func(...any) any
+func Compose(fnList ...func(...interface{}) interface{}) func(...interface{}) interface{}
 ```
+
 <b>例子:</b>

 ```go
@@ -177,25 +181,70 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
-	add1 := func(v ...any) any {
-		return v[0].(int) + 1
-	}
-	add2 := func(v ...any) any {
-		return v[0].(int) + 2
-	}
+    add1 := func(v ...interface{}) interface{} {
+        return v[0].(int) + 1
+    }
+    add2 := func(v ...interface{}) interface{} {
+        return v[0].(int) + 2
+    }

-	add3 := function.Compose(add1, add2)
-	result := add3(1)
+    add3 := function.Compose(add1, add2)
+    result := add3(1)

-	fmt.Println(result) //4
+    fmt.Println(result) //4
 }
 ```

+### <span id="Debounce">Debounce</span>

+<p>创建一个函数的去抖动版本。该去抖动函数仅在上次调用后的指定延迟时间过去之后才会调用原始函数。支持取消去抖动。</p>
+
+<b>函数签名:</b>
+
+```go
+func Debounce(fn func(), delay time.Duration) (debouncedFn func(), cancelFn func())
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/function"
+)
+
+func main() {
+    callCount := 0
+    fn := func() {
+        callCount++
+    }
+
+    debouncedFn, _ := function.Debounce(fn, 500*time.Millisecond)
+
+    for i := 0; i < 10; i++ {
+        debouncedFn()
+        time.Sleep(50 * time.Millisecond)
+    }
+
+    time.Sleep(1 * time.Second)
+    fmt.Println(callCount)
+
+    debouncedFn()
+
+    time.Sleep(1 * time.Second)
+    fmt.Println(callCount)
+
+    // Output:
+    // 1
+    // 2
+}
+```

 ### <span id="Debounced">Debounced</span>

@@ -206,6 +255,7 @@ func main() {
 ```go
 func Debounced(fn func(), duration time.Duration) func()
 ```
+
 <b>例子:</b>

 ```go
@@ -213,31 +263,71 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
-	count := 0
-	add := func() {
-		count++
-	}
+    count := 0
+    add := func() {
+        count++
+    }

-	debouncedAdd := function.Debounced(add, 50*time.Microsecond)
-	function.debouncedAdd()
-	function.debouncedAdd()
-	function.debouncedAdd()
-	function.debouncedAdd()
+    debouncedAdd := function.Debounced(add, 50*time.Microsecond)
+    function.debouncedAdd()
+    function.debouncedAdd()
+    function.debouncedAdd()
+    function.debouncedAdd()

-	time.Sleep(100 * time.Millisecond)
-	fmt.Println(count) //1
+    time.Sleep(100 * time.Millisecond)
+    fmt.Println(count) //1

-	function.debouncedAdd()
-	time.Sleep(100 * time.Millisecond)
-	fmt.Println(count) //2
+    function.debouncedAdd()
+    time.Sleep(100 * time.Millisecond)
+    fmt.Println(count) //2
 }
 ```

+### <span id="Throttle">Throttle</span>

+<p>创建一个函数的节流版本。返回的函数保证在每个时间间隔内最多只会被调用一次。</p>
+
+<b>函数签名:</b>
+
+```go
+func Throttle(fn func(), interval time.Duration) func()
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/function"
+)
+
+func main() {
+    callCount := 0
+
+    fn := func() {
+        callCount++
+    }
+
+    throttledFn := function.Throttle(fn, 1*time.Second)
+
+    for i := 0; i < 5; i++ {
+        throttledFn()
+    }
+
+    time.Sleep(1 * time.Second)
+
+    fmt.Println(callCount)
+
+    // Output:
+    // 1
+}
+```

 ### <span id="Delay">Delay</span>

@@ -246,8 +336,9 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Delay(delay time.Duration, fn any, args ...any)
+func Delay(delay time.Duration, fn interface{}, args ...interface{})
 ```
+
 <b>例子:</b>

 ```go
@@ -255,19 +346,17 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
-	var print = func(s string) {
-		fmt.Println(count) //test delay
-	}
-	function.Delay(2*time.Second, print, "test delay")
+    var print = func(s string) {
+        fmt.Println(count) //test delay
+    }
+    function.Delay(2*time.Second, print, "test delay")
 }
 ```

-
-
 ### <span id="Schedule">Schedule</span>

 <p>每次持续时间调用函数，直到关闭返回的 bool chan</p>
@@ -275,8 +364,9 @@ func main() {
 <b>函数签名:</b>

 ```go
-func Schedule(d time.Duration, fn any, args ...any) chan bool
+func Schedule(d time.Duration, fn interface{}, args ...interface{}) chan bool
 ```
+
 <b>例子:</b>

 ```go
@@ -284,24 +374,64 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
    var res []string
-	appendStr := func(s string) {
-		res = append(res, s)
-	}
+    appendStr := func(s string) {
+        res = append(res, s)
+    }

-	stop := function.Schedule(1*time.Second, appendStr, "*")
-	time.Sleep(5 * time.Second)
-	close(stop)
+    stop := function.Schedule(1*time.Second, appendStr, "*")
+    time.Sleep(5 * time.Second)
+    close(stop)

    fmt.Println(res) //[* * * * *]
 }
 ```

+### <span id="Pipeline">Pipeline</span>

+<p>管道执行多个函数</p>
+
+<b>函数签名:</b>
+
+```go
+func Pipeline(funcs ...func(interface{}) interface{}) func(interface{}) interface{}
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/function"
+)
+
+func main() {
+    addOne := func(x interface{}) interface{} {
+        return x.(int) + 1
+    }
+    double := func(x interface{}) interface{} {
+        return 2 * x.(int)
+    }
+    square := func(x interface{}) interface{} {
+        return x.(int) * x.(int)
+    }
+
+    f := function.Pipeline(addOne, double, square)
+
+    result := fn(2)
+
+    fmt.Println(result)
+
+    // Output:
+    // 36
+}
+```

 ### <span id="Watcher">Watcher</span>

@@ -311,15 +441,16 @@ func main() {

 ```go
 type Watcher struct {
-	startTime int64
-	stopTime  int64
-	excuting  bool
+    startTime int64
+    stopTime  int64
+    excuting  bool
 }
 func (w *Watcher) Start() //start the watcher
 func (w *Watcher) Stop() //stop the watcher
 func (w *Watcher) Reset() //reset the watcher
 func (w *Watcher) GetElapsedTime() time.Duration //get the elapsed time of function execution
 ```
+
 <b>例子:</b>

 ```go
@@ -327,38 +458,35 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/function"
+    "github.com/duke-git/lancet/function"
 )

 func main() {
    w := &function.Watcher{}
-	w.Start()
+    w.Start()

-	longRunningTask()
+    longRunningTask()

-	fmt.Println(w.excuting) //true
+    fmt.Println(w.excuting) //true

-	w.Stop()
+    w.Stop()

-	eapsedTime := w.GetElapsedTime().Milliseconds()
-	fmt.Println(eapsedTime)
+    eapsedTime := w.GetElapsedTime().Milliseconds()
+    fmt.Println(eapsedTime)

-	w.Reset()
+    w.Reset()

-	fmt.Println(w.excuting) //false
+    fmt.Println(w.excuting) //false

-	fmt.Println(w.startTime) //0
-	fmt.Println(w.stopTime) //0
+    fmt.Println(w.startTime) //0
+    fmt.Println(w.stopTime) //0
 }

 func longRunningTask() {
-	var slice []int64
-	for i := 0; i < 10000000; i++ {
-		slice = append(slice, int64(i))
-	}
+    var slice []int64
+    for i := 0; i < 10000000; i++ {
+        slice = append(slice, int64(i))
+    }
 }

 ```
-
-
-
--- a/docs/mathutil.md
+++ b/docs/mathutil.md
@@ -1,39 +1,54 @@
 # Mathutil
+
 Package mathutil implements some functions for math calculation.

 <div STYLE="page-break-after: always;"></div>

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/mathutil/mathutil.go](https://github.com/duke-git/lancet/blob/main/mathutil/mathutil.go)
-
+[https://github.com/duke-git/lancet/blob/v1/mathutil/mathutil.go](https://github.com/duke-git/lancet/blob/v1/mathutil/mathutil.go)

 <div STYLE="page-break-after: always;"></div>

 ## Example:
+
 ```go
 import (
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )
 ```

 <div STYLE="page-break-after: always;"></div>

 ## Index
- [Exponent](#Exponent)
- [Fibonacci](#Fibonacci)
- [Factorial](#Factorial)
- [Percent](#Percent)
- [RoundToFloat](#RoundToFloat)
- [RoundToString](#RoundToString)
- [TruncRound](#TruncRound)
+
+-   [Exponent](#Exponent)
+-   [Fibonacci](#Fibonacci)
+-   [Factorial](#Factorial)
+-   [Percent](#Percent)
+-   [RoundToFloat](#RoundToFloat)
+-   [RoundToString](#RoundToString)
+-   [TruncRound](#TruncRound)
+-   [CeilToFloat](#CeilToFloat)
+-   [CeilToString](#CeilToString)
+-   [FloorToFloat](#FloorToFloat)
+-   [FloorToString](#FloorToString)
+-   [AngleToRadian](#AngleToRadian)
+-   [RadianToAngle](#RadianToAngle)
+-   [PointDistance](#PointDistance)
+-   [IsPrime](#IsPrime)
+-   [GCD](#GCD)
+-   [LCM](#LCM)
+-   [Cos](#Cos)
+-   [Sin](#Sin)
+-   [Log](#Log)

 <div STYLE="page-break-after: always;"></div>

 ## Documentation

-
 ### <span id="Exponent">Exponent</span>
+
 <p>Calculate x to the nth power.</p>

 <b>Signature:</b>
@@ -41,6 +56,7 @@ import (
 ```go
 func Exponent(x, n int64) int64
 ```
+
 <b>Example:</b>

 ```go
@@ -48,19 +64,18 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
-	fmt.Println(mathutil.Exponent(10, 0)) //1
-	fmt.Println(mathutil.Exponent(10, 1)) //10
-	fmt.Println(mathutil.Exponent(10, 2)) //100
+    fmt.Println(mathutil.Exponent(10, 0)) //1
+    fmt.Println(mathutil.Exponent(10, 1)) //10
+    fmt.Println(mathutil.Exponent(10, 2)) //100
 }
 ```

-
-
 ### <span id="Fibonacci">Fibonacci</span>
+
 <p>Calculate the nth number of fibonacci sequence.</p>

 <b>Signature:</b>
@@ -68,6 +83,7 @@ func main() {
 ```go
 func Fibonacci(first, second, n int) int
 ```
+
 <b>Example:</b>

 ```go
@@ -75,21 +91,20 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
-	fmt.Println(mathutil.Fibonacci(1, 1, 1)) //1
-	fmt.Println(mathutil.Fibonacci(1, 1, 2)) //1
-	fmt.Println(mathutil.Fibonacci(1, 1, 3)) //2
-	fmt.Println(mathutil.Fibonacci(1, 1, 4)) //3
-	fmt.Println(mathutil.Fibonacci(1, 1, 5)) //5
+    fmt.Println(mathutil.Fibonacci(1, 1, 1)) //1
+    fmt.Println(mathutil.Fibonacci(1, 1, 2)) //1
+    fmt.Println(mathutil.Fibonacci(1, 1, 3)) //2
+    fmt.Println(mathutil.Fibonacci(1, 1, 4)) //3
+    fmt.Println(mathutil.Fibonacci(1, 1, 5)) //5
 }
 ```

-
-
 ### <span id="Factorial">Factorial</span>
+
 <p>Calculate the factorial of x.</p>

 <b>Signature:</b>
@@ -97,6 +112,7 @@ func main() {
 ```go
 func Factorial(x uint) uint
 ```
+
 <b>Example:</b>

 ```go
@@ -104,20 +120,19 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
-	fmt.Println(mathutil.Factorial(0)) //1
-	fmt.Println(mathutil.Factorial(1)) //1
-	fmt.Println(mathutil.Factorial(2)) //2
-	fmt.Println(mathutil.Factorial(3)) //6
+    fmt.Println(mathutil.Factorial(0)) //1
+    fmt.Println(mathutil.Factorial(1)) //1
+    fmt.Println(mathutil.Factorial(2)) //2
+    fmt.Println(mathutil.Factorial(3)) //6
 }
 ```

-
-
 ### <span id="Percent">Percent</span>
+
 <p>calculate the percentage of val to total, retain n decimal places.</p>

 <b>Signature:</b>
@@ -125,6 +140,7 @@ func main() {
 ```go
 func Percent(val, total float64, n int) float64
 ```
+
 <b>Example:</b>

 ```go
@@ -132,18 +148,17 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
-	fmt.Println(mathutil.Percent(1, 2, 2)) //1
-	fmt.Println(mathutil.Percent(0.1, 0.3, 2)) //33.33
+    fmt.Println(mathutil.Percent(1, 2, 2)) //1
+    fmt.Println(mathutil.Percent(0.1, 0.3, 2)) //33.33
 }
 ```

-
-
 ### <span id="RoundToFloat">RoundToFloat</span>
+
 <p>Round float up to n decimal places.</p>

 <b>Signature:</b>
@@ -151,6 +166,7 @@ func main() {
 ```go
 func RoundToFloat(x float64, n int) float64
 ```
+
 <b>Example:</b>

 ```go
@@ -158,22 +174,20 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
-	fmt.Println(mathutil.RoundToFloat(0, 0)) //0
-	fmt.Println(mathutil.RoundToFloat(0, 1)) //0
-	fmt.Println(mathutil.RoundToFloat(0.124, 2)) //0.12
-	fmt.Println(mathutil.RoundToFloat(0.125, 2)) //0.13
-	fmt.Println(mathutil.RoundToFloat(0.125, 3)) //0.125
+    fmt.Println(mathutil.RoundToFloat(0, 0)) //0
+    fmt.Println(mathutil.RoundToFloat(0, 1)) //0
+    fmt.Println(mathutil.RoundToFloat(0.124, 2)) //0.12
+    fmt.Println(mathutil.RoundToFloat(0.125, 2)) //0.13
+    fmt.Println(mathutil.RoundToFloat(0.125, 3)) //0.125
 }
 ```

-
-
-
 ### <span id="RoundToString">RoundToString</span>
+
 <p>Round float up to n decimal places. will return string.</p>

 <b>Signature:</b>
@@ -181,6 +195,7 @@ func main() {
 ```go
 func RoundToString(x float64, n int) string
 ```
+
 <b>Example:</b>

 ```go
@@ -188,21 +203,20 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
-	fmt.Println(mathutil.RoundToString(0, 0)) //"0"
-	fmt.Println(mathutil.RoundToString(0, 1)) //"0.0:
-	fmt.Println(mathutil.RoundToString(0.124, 2)) //"0.12"
-	fmt.Println(mathutil.RoundToString(0.125, 2)) //"0.13"
-	fmt.Println(mathutil.RoundToString(0.125, 3)) //"0.125"
+    fmt.Println(mathutil.RoundToString(0, 0)) //"0"
+    fmt.Println(mathutil.RoundToString(0, 1)) //"0.0:
+    fmt.Println(mathutil.RoundToString(0.124, 2)) //"0.12"
+    fmt.Println(mathutil.RoundToString(0.125, 2)) //"0.13"
+    fmt.Println(mathutil.RoundToString(0.125, 3)) //"0.125"
 }
 ```

-
-
 ### <span id="TruncRound">TruncRound</span>
+
 <p>Round float off n decimal places.</p>

 <b>Signature:</b>
@@ -210,6 +224,7 @@ func main() {
 ```go
 func TruncRound(x float64, n int) float64
 ```
+
 <b>Example:</b>

 ```go
@@ -217,17 +232,497 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
-	fmt.Println(mathutil.TruncRound(0, 0)) //0
-	fmt.Println(mathutil.TruncRound(0, 1)) //0
-	fmt.Println(mathutil.TruncRound(0.124, 2)) //0.12
-	fmt.Println(mathutil.TruncRound(0.125, 2)) //0.12
-	fmt.Println(mathutil.TruncRound(0.125, 3)) //0.125
+    fmt.Println(mathutil.TruncRound(0, 0)) //0
+    fmt.Println(mathutil.TruncRound(0, 1)) //0
+    fmt.Println(mathutil.TruncRound(0.124, 2)) //0.12
+    fmt.Println(mathutil.TruncRound(0.125, 2)) //0.12
+    fmt.Println(mathutil.TruncRound(0.125, 3)) //0.125
 }
 ```

+### <span id="CeilToFloat">CeilToFloat</span>

+<p>Round float up n decimal places.</p>

+<b>Signature:</b>
+
+```go
+func CeilToFloat(x float64, n int) float64
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+	result1 := mathutil.CeilToFloat(3.14159, 1)
+	result2 := mathutil.CeilToFloat(3.14159, 2)
+	result3 := mathutil.CeilToFloat(5, 4)
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+
+	// Output:
+	// 3.2
+	// 3.15
+	// 5
+}
+```
+
+### <span id="CeilToString">CeilToString</span>
+
+<p>Round float up n decimal places.</p>
+
+<b>Signature:</b>
+
+```go
+func CeilToString(x float64, n int) string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+	result1 := mathutil.CeilToString(3.14159, 1)
+	result2 := mathutil.CeilToString(3.14159, 2)
+	result3 := mathutil.CeilToString(5, 4)
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+
+	// Output:
+	// 3.2
+	// 3.15
+	// 5.0000
+}
+```
+
+### <span id="FloorToFloat">FloorToFloat</span>
+
+<p>Round float down n decimal places.</p>
+
+<b>Signature:</b>
+
+```go
+func CeilToString(x float64, n int) string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+	result1 := mathutil.FloorToFloat(3.14159, 1)
+	result2 := mathutil.FloorToFloat(3.14159, 2)
+	result3 := mathutil.FloorToFloat(5, 4)
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+
+	// Output:
+	// 3.1
+	// 3.14
+	// 5
+}
+```
+
+### <span id="FloorToString">FloorToString</span>
+
+<p>Round float down n decimal places.</p>
+
+<b>Signature:</b>
+
+```go
+func CeilToString(x float64, n int) string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+	result1 := mathutil.FloorToString(3.14159, 1)
+	result2 := mathutil.FloorToString(3.14159, 2)
+	result3 := mathutil.FloorToString(5, 4)
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+
+	// Output:
+	// 3.1
+	// 3.14
+	// 5.0000
+}
+```
+
+### <span id="AngleToRadian">AngleToRadian</span>
+
+<p>Converts angle value to radian value.</p>
+
+<b>Signature:</b>
+
+```go
+func AngleToRadian(angle float64) float64
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.AngleToRadian(45)
+    result2 := mathutil.AngleToRadian(90)
+    result3 := mathutil.AngleToRadian(180)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+
+    // Output:
+    // 0.7853981633974483
+    // 1.5707963267948966
+    // 3.141592653589793
+}
+```
+
+### <span id="RadianToAngle">RadianToAngle</span>
+
+<p>Converts radian value to angle value.</p>
+
+<b>Signature:</b>
+
+```go
+func RadianToAngle(radian float64) float64
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.RadianToAngle(math.Pi)
+    result2 := mathutil.RadianToAngle(math.Pi / 2)
+    result3 := mathutil.RadianToAngle(math.Pi / 4)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+
+    // Output:
+    // 180
+    // 90
+    // 45
+}
+```
+
+### <span id="PointDistance">PointDistance</span>
+
+<p>Caculates two points distance.</p>
+
+<b>Signature:</b>
+
+```go
+func PointDistance(x1, y1, x2, y2 float64) float64
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.PointDistance(1, 1, 4, 5)
+
+    fmt.Println(result1)
+
+    // Output:
+    // 5
+}
+```
+
+### <span id="IsPrime">IsPrime</span>
+
+<p>Checks if number is prime number.</p>
+
+<b>Signature:</b>
+
+```go
+func IsPrime(n int) bool
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.IsPrime(-1)
+    result2 := mathutil.IsPrime(0)
+    result3 := mathutil.IsPrime(1)
+    result4 := mathutil.IsPrime(2)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+
+    // Output:
+    // false
+    // false
+    // false
+    // true
+}
+```
+
+### <span id="GCD">GCD</span>
+
+<p>Return greatest common divisor (GCD) of integers.</p>
+
+<b>Signature:</b>
+
+```go
+func GCD(integers ...int) int
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.GCD(1, 1)
+    result2 := mathutil.GCD(1, -1)
+    result3 := mathutil.GCD(-1, 1)
+    result4 := mathutil.GCD(-1, -1)
+    result5 := mathutil.GCD(3, 6, 9)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+
+    // Output:
+    // 1
+    // 1
+    // -1
+    // -1
+    // 3
+}
+```
+
+### <span id="LCM">LCM</span>
+
+<p>Return Least Common Multiple (LCM) of integers.</p>
+
+<b>Signature:</b>
+
+```go
+func LCM(integers ...int) int
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.LCM(1, 1)
+    result2 := mathutil.LCM(1, 2)
+    result3 := mathutil.LCM(3, 6, 9)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+
+    // Output:
+    // 1
+    // 2
+    // 18
+}
+```
+
+### <span id="Cos">Cos</span>
+
+<p>Returns the cosine of the radian argument.</p>
+
+<b>Signature:</b>
+
+```go
+func Cos(radian float64, precision ...int) float64
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.Cos(0)
+    result2 := mathutil.Cos(90)
+    result3 := mathutil.Cos(180)
+    result4 := mathutil.Cos(math.Pi)
+    result5 := mathutil.Cos(math.Pi / 2)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+
+    // Output:
+    // 1
+    // -0.447
+    // -0.598
+    // -1
+    // 0
+}
+```
+
+### <span id="Sin">Sin</span>
+
+<p>Returns the sine of the radian argument.</p>
+
+<b>Signature:</b>
+
+```go
+func Sin(radian float64, precision ...int) float64
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.Sin(0)
+    result2 := mathutil.Sin(90)
+    result3 := mathutil.Sin(180)
+    result4 := mathutil.Sin(math.Pi)
+    result5 := mathutil.Sin(math.Pi / 2)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+
+    // Output:
+    // 0
+    // 0.894
+    // -0.801
+    // 0
+    // 1
+}
+```
+
+### <span id="Log">Log</span>
+
+<p>Returns the logarithm of base n.</p>
+
+<b>Signature:</b>
+
+```go
+func Log(n, base float64) float64
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.Log(8, 2)
+    result2 := mathutil.TruncRound(mathutil.Log(5, 2), 2)
+    result3 := mathutil.TruncRound(mathutil.Log(27, 3), 0)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+
+    // Output:
+    // 3
+    // 2.32
+    // 3
+}
+```
--- a/docs/mathutil_zh-CN.md
+++ b/docs/mathutil_zh-CN.md
@@ -1,40 +1,54 @@
 # Mathutil
-mathutil包实现了一些数学计算的函数.
+
+mathutil 包实现了一些数学计算的函数.

 <div STYLE="page-break-after: always;"></div>

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/mathutil/mathutil.go](https://github.com/duke-git/lancet/blob/main/mathutil/mathutil.go)
-
+[https://github.com/duke-git/lancet/blob/v1/mathutil/mathutil.go](https://github.com/duke-git/lancet/blob/v1/mathutil/mathutil.go)

 <div STYLE="page-break-after: always;"></div>

 ## 用法:
+
 ```go
 import (
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )
 ```

 <div STYLE="page-break-after: always;"></div>

 ## 目录
- [Exponent](#Exponent)
- [Fibonacci](#Fibonacci)
- [Factorial](#Factorial)

- [Percent](#Percent)
- [RoundToFloat](#RoundToFloat)
- [RoundToString](#RoundToString)
- [TruncRound](#TruncRound)
+-   [Exponent](#Exponent)
+-   [Fibonacci](#Fibonacci)
+-   [Factorial](#Factorial)
+-   [Percent](#Percent)
+-   [RoundToFloat](#RoundToFloat)
+-   [RoundToString](#RoundToString)
+-   [TruncRound](#TruncRound)
+-   [CeilToFloat](#CeilToFloat)
+-   [CeilToString](#CeilToString)
+-   [FloorToFloat](#FloorToFloat)
+-   [FloorToString](#FloorToString)
+-   [AngleToRadian](#AngleToRadian)
+-   [RadianToAngle](#RadianToAngle)
+-   [PointDistance](#PointDistance)
+-   [IsPrime](#IsPrime)
+-   [GCD](#GCD)
+-   [LCM](#LCM)
+-   [Cos](#Cos)
+-   [Sin](#Sin)
+-   [Log](#Log)

 <div STYLE="page-break-after: always;"></div>

 ## Documentation

-
 ### <span id="Exponent">Exponent</span>
+
 <p>指数计算（x的n次方）</p>

 <b>函数签名:</b>
@@ -42,6 +56,7 @@ import (
 ```go
 func Exponent(x, n int64) int64
 ```
+
 <b>例子:</b>

 ```go
@@ -49,19 +64,18 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
-	fmt.Println(mathutil.Exponent(10, 0)) //1
-	fmt.Println(mathutil.Exponent(10, 1)) //10
-	fmt.Println(mathutil.Exponent(10, 2)) //100
+    fmt.Println(mathutil.Exponent(10, 0)) //1
+    fmt.Println(mathutil.Exponent(10, 1)) //10
+    fmt.Println(mathutil.Exponent(10, 2)) //100
 }
 ```

-
-
 ### <span id="Fibonacci">Fibonacci</span>
+
 <p>计算斐波那契数列的第n个数</p>

 <b>函数签名:</b>
@@ -69,6 +83,7 @@ func main() {
 ```go
 func Fibonacci(first, second, n int) int
 ```
+
 <b>例子:</b>

 ```go
@@ -76,21 +91,20 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
-	fmt.Println(mathutil.Fibonacci(1, 1, 1)) //1
-	fmt.Println(mathutil.Fibonacci(1, 1, 2)) //1
-	fmt.Println(mathutil.Fibonacci(1, 1, 3)) //2
-	fmt.Println(mathutil.Fibonacci(1, 1, 4)) //3
-	fmt.Println(mathutil.Fibonacci(1, 1, 5)) //5
+    fmt.Println(mathutil.Fibonacci(1, 1, 1)) //1
+    fmt.Println(mathutil.Fibonacci(1, 1, 2)) //1
+    fmt.Println(mathutil.Fibonacci(1, 1, 3)) //2
+    fmt.Println(mathutil.Fibonacci(1, 1, 4)) //3
+    fmt.Println(mathutil.Fibonacci(1, 1, 5)) //5
 }
 ```

-
-
 ### <span id="Factorial">Factorial</span>
+
 <p>计算阶乘</p>

 <b>函数签名:</b>
@@ -98,6 +112,7 @@ func main() {
 ```go
 func Factorial(x uint) uint
 ```
+
 <b>例子:</b>

 ```go
@@ -105,20 +120,19 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
-	fmt.Println(mathutil.Factorial(0)) //1
-	fmt.Println(mathutil.Factorial(1)) //1
-	fmt.Println(mathutil.Factorial(2)) //2
-	fmt.Println(mathutil.Factorial(3)) //6
+    fmt.Println(mathutil.Factorial(0)) //1
+    fmt.Println(mathutil.Factorial(1)) //1
+    fmt.Println(mathutil.Factorial(2)) //2
+    fmt.Println(mathutil.Factorial(3)) //6
 }
 ```

-
-
 ### <span id="Percent">Percent</span>
+
 <p>计算百分比，保留n位小数</p>

 <b>函数签名:</b>
@@ -126,6 +140,7 @@ func main() {
 ```go
 func Percent(val, total float64, n int) float64
 ```
+
 <b>例子:</b>

 ```go
@@ -133,18 +148,17 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
-	fmt.Println(mathutil.Percent(1, 2, 2)) //1
-	fmt.Println(mathutil.Percent(0.1, 0.3, 2)) //33.33
+    fmt.Println(mathutil.Percent(1, 2, 2)) //1
+    fmt.Println(mathutil.Percent(0.1, 0.3, 2)) //33.33
 }
 ```

-
-
 ### <span id="RoundToFloat">RoundToFloat</span>
+
 <p>四舍五入，保留n位小数</p>

 <b>函数签名:</b>
@@ -152,6 +166,7 @@ func main() {
 ```go
 func RoundToFloat(x float64, n int) float64
 ```
+
 <b>例子:</b>

 ```go
@@ -159,22 +174,20 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
-	fmt.Println(mathutil.RoundToFloat(0, 0)) //0
-	fmt.Println(mathutil.RoundToFloat(0, 1)) //0
-	fmt.Println(mathutil.RoundToFloat(0.124, 2)) //0.12
-	fmt.Println(mathutil.RoundToFloat(0.125, 2)) //0.13
-	fmt.Println(mathutil.RoundToFloat(0.125, 3)) //0.125
+    fmt.Println(mathutil.RoundToFloat(0, 0)) //0
+    fmt.Println(mathutil.RoundToFloat(0, 1)) //0
+    fmt.Println(mathutil.RoundToFloat(0.124, 2)) //0.12
+    fmt.Println(mathutil.RoundToFloat(0.125, 2)) //0.13
+    fmt.Println(mathutil.RoundToFloat(0.125, 3)) //0.125
 }
 ```

-
-
-
 ### <span id="RoundToString">RoundToString</span>
+
 <p>四舍五入，保留n位小数，返回字符串</p>

 <b>函数签名:</b>
@@ -182,6 +195,7 @@ func main() {
 ```go
 func RoundToString(x float64, n int) string
 ```
+
 <b>例子:</b>

 ```go
@@ -189,21 +203,20 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
-	fmt.Println(mathutil.RoundToString(0, 0)) //"0"
-	fmt.Println(mathutil.RoundToString(0, 1)) //"0.0:
-	fmt.Println(mathutil.RoundToString(0.124, 2)) //"0.12"
-	fmt.Println(mathutil.RoundToString(0.125, 2)) //"0.13"
-	fmt.Println(mathutil.RoundToString(0.125, 3)) //"0.125"
+    fmt.Println(mathutil.RoundToString(0, 0)) //"0"
+    fmt.Println(mathutil.RoundToString(0, 1)) //"0.0:
+    fmt.Println(mathutil.RoundToString(0.124, 2)) //"0.12"
+    fmt.Println(mathutil.RoundToString(0.125, 2)) //"0.13"
+    fmt.Println(mathutil.RoundToString(0.125, 3)) //"0.125"
 }
 ```

-
-
 ### <span id="TruncRound">TruncRound</span>
+
 <p>截短n位小数（不进行四舍五入）</p>

 <b>函数签名:</b>
@@ -211,6 +224,7 @@ func main() {
 ```go
 func TruncRound(x float64, n int) float64
 ```
+
 <b>例子:</b>

 ```go
@@ -218,17 +232,501 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/mathutil"
+    "github.com/duke-git/lancet/mathutil"
 )

 func main() {
-	fmt.Println(mathutil.TruncRound(0, 0)) //0
-	fmt.Println(mathutil.TruncRound(0, 1)) //0
-	fmt.Println(mathutil.TruncRound(0.124, 2)) //0.12
-	fmt.Println(mathutil.TruncRound(0.125, 2)) //0.12
-	fmt.Println(mathutil.TruncRound(0.125, 3)) //0.125
+    fmt.Println(mathutil.TruncRound(0, 0)) //0
+    fmt.Println(mathutil.TruncRound(0, 1)) //0
+    fmt.Println(mathutil.TruncRound(0.124, 2)) //0.12
+    fmt.Println(mathutil.TruncRound(0.125, 2)) //0.12
+    fmt.Println(mathutil.TruncRound(0.125, 3)) //0.125
+}
+```
+
+### <span id="CeilToFloat">CeilToFloat</span>
+
+<p>向上舍入（进一法），保留n位小数。</p>
+
+<b>函数签名:</b>
+
+```go
+func CeilToFloat(x float64, n int) float64
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.CeilToFloat(3.14159, 1)
+    result2 := mathutil.CeilToFloat(3.14159, 2)
+    result3 := mathutil.CeilToFloat(5, 4)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+
+    // Output:
+    // 3.2
+    // 3.15
+    // 5
+}
+```
+
+### <span id="CeilToString">CeilToString</span>
+
+<p>向上舍入（进一法），保留n位小数，返回字符串。</p>
+
+<b>函数签名:</b>
+
+```go
+func CeilToString(x float64, n int) string
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.CeilToString(3.14159, 1)
+    result2 := mathutil.CeilToString(3.14159, 2)
+    result3 := mathutil.CeilToString(5, 4)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+
+    // Output:
+    // 3.2
+    // 3.15
+    // 5.0000
+}
+```
+
+### <span id="FloorToFloat">FloorToFloat</span>
+
+<p>向下舍入（去尾法），保留n位小数。</p>
+
+<b>函数签名:</b>
+
+```go
+func CeilToString(x float64, n int) string
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.FloorToFloat(3.14159, 1)
+    result2 := mathutil.FloorToFloat(3.14159, 2)
+    result3 := mathutil.FloorToFloat(5, 4)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+
+    // Output:
+    // 3.1
+    // 3.14
+    // 5
+}
+```
+
+### <span id="FloorToString">FloorToString</span>
+
+<p>向下舍入（去尾法），保留n位小数，返回字符串。</p>
+
+<b>函数签名:</b>
+
+```go
+func CeilToString(x float64, n int) string
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.FloorToString(3.14159, 1)
+    result2 := mathutil.FloorToString(3.14159, 2)
+    result3 := mathutil.FloorToString(5, 4)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+
+    // Output:
+    // 3.1
+    // 3.14
+    // 5.0000
 }
 ```


+### <span id="AngleToRadian">AngleToRadian</span>

+<p>将角度值转为弧度值</p>
+
+<b>函数签名:</b>
+
+```go
+func AngleToRadian(angle float64) float64
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.AngleToRadian(45)
+    result2 := mathutil.AngleToRadian(90)
+    result3 := mathutil.AngleToRadian(180)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+
+    // Output:
+    // 0.7853981633974483
+    // 1.5707963267948966
+    // 3.141592653589793
+}
+```
+
+### <span id="RadianToAngle">RadianToAngle</span>
+
+<p>将弧度值转为角度值</p>
+
+<b>函数签名:</b>
+
+```go
+func RadianToAngle(radian float64) float64
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.RadianToAngle(math.Pi)
+    result2 := mathutil.RadianToAngle(math.Pi / 2)
+    result3 := mathutil.RadianToAngle(math.Pi / 4)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+
+    // Output:
+    // 180
+    // 90
+    // 45
+}
+```
+
+### <span id="PointDistance">PointDistance</span>
+
+<p>计算两个坐标点的距离</p>
+
+<b>函数签名:</b>
+
+```go
+func PointDistance(x1, y1, x2, y2 float64) float64
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.PointDistance(1, 1, 4, 5)
+
+    fmt.Println(result1)
+
+    // Output:
+    // 5
+}
+```
+
+### <span id="IsPrime">IsPrime</span>
+
+<p>判断质数。</p>
+
+<b>函数签名:</b>
+
+```go
+func IsPrime(n int) bool
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.IsPrime(-1)
+    result2 := mathutil.IsPrime(0)
+    result3 := mathutil.IsPrime(1)
+    result4 := mathutil.IsPrime(2)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+
+    // Output:
+    // false
+    // false
+    // false
+    // true
+}
+```
+
+
+### <span id="GCD">GCD</span>
+
+<p>计算整数最大公约数。</p>
+
+<b>函数签名:</b>
+
+```go
+func GCD(integers ...int) int
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.GCD(1, 1)
+    result2 := mathutil.GCD(1, -1)
+    result3 := mathutil.GCD(-1, 1)
+    result4 := mathutil.GCD(-1, -1)
+    result5 := mathutil.GCD(3, 6, 9)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+
+    // Output:
+    // 1
+    // 1
+    // -1
+    // -1
+    // 3
+}
+```
+
+### <span id="LCM">LCM</span>
+
+<p>计算整数最小公倍数。</p>
+
+<b>函数签名:</b>
+
+```go
+func LCM(integers ...int) int
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.LCM(1, 1)
+    result2 := mathutil.LCM(1, 2)
+    result3 := mathutil.LCM(3, 6, 9)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+
+    // Output:
+    // 1
+    // 2
+    // 18
+}
+```
+
+
+### <span id="Cos">Cos</span>
+
+<p>计算弧度的余弦值。</p>
+
+<b>函数签名:</b>
+
+```go
+func Cos(radian float64, precision ...int) float64
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.Cos(0)
+    result2 := mathutil.Cos(90)
+    result3 := mathutil.Cos(180)
+    result4 := mathutil.Cos(math.Pi)
+    result5 := mathutil.Cos(math.Pi / 2)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+
+    // Output:
+    // 1
+    // -0.447
+    // -0.598
+    // -1
+    // 0
+}
+```
+
+
+### <span id="Sin">Sin</span>
+
+<p>计算弧度的正弦值。</p>
+
+<b>函数签名:</b>
+
+```go
+func Sin(radian float64, precision ...int) float64
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.Sin(0)
+    result2 := mathutil.Sin(90)
+    result3 := mathutil.Sin(180)
+    result4 := mathutil.Sin(math.Pi)
+    result5 := mathutil.Sin(math.Pi / 2)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+    fmt.Println(result4)
+    fmt.Println(result5)
+
+    // Output:
+    // 0
+    // 0.894
+    // -0.801
+    // 0
+    // 1
+}
+```
+
+### <span id="Log">Log</span>
+
+<p>计算以base为底n的对数。</p>
+
+<b>函数签名:</b>
+
+```go
+func Log(n, base float64) float64
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/mathutil"
+)
+
+func main() {
+    result1 := mathutil.Log(8, 2)
+    result2 := mathutil.TruncRound(mathutil.Log(5, 2), 2)
+    result3 := mathutil.TruncRound(mathutil.Log(27, 3), 0)
+
+    fmt.Println(result1)
+    fmt.Println(result2)
+    fmt.Println(result3)
+
+    // Output:
+    // 3
+    // 2.32
+    // 3
+}
+```
--- a/docs/netutil.md
+++ b/docs/netutil.md
--- a/docs/netutil_zh-CN.md
+++ b/docs/netutil_zh-CN.md
--- a/docs/random.md
+++ b/docs/random.md
@@ -1,36 +1,49 @@
 # Random
+
 Package random implements some basic functions to generate random int and string.

 <div STYLE="page-break-after: always;"></div>

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/random/random.go](https://github.com/duke-git/lancet/blob/main/random/random.go)
-
+[https://github.com/duke-git/lancet/blob/v1/random/random.go](https://github.com/duke-git/lancet/blob/v1/random/random.go)

 <div STYLE="page-break-after: always;"></div>

 ## Usage:
+
 ```go
 import (
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )
 ```

 <div STYLE="page-break-after: always;"></div>

 ## Index
- [RandBytes](#RandBytes)
- [RandInt](#RandInt)
- [RandString](#RandString)
- [UUIdV4](#UUIdV4)
+
+-   [RandBytes](#RandBytes)
+-   [RandInt](#RandInt)
+-   [RandString](#RandString)
+-   [RandUpper](#RandUpper)
+-   [RandLower](#RandLower)
+-   [RandNumeral](#RandNumeral)
+-   [RandNumeralOrLetter](#RandNumeralOrLetter)
+-   [UUIdV4](#UUIdV4)
+-   [RandFloat](#RandFloat)
+-   [RandFloats](#RandFloats)
+-   [RandUniqueIntSlice](#RandUniqueIntSlice)
+-   [RandIntSlice](#RandIntSlice)
+-   [RandStringSlice](#RandStringSlice)
+-   [RandBool](#RandBool)
+-   [RandBoolSlice](#RandBoolSlice)

 <div STYLE="page-break-after: always;"></div>

 ## Documentation

-
 ### <span id="RandBytes">RandBytes</span>
+
 <p>Generate random byte slice.</p>

 <b>Signature:</b>
@@ -38,6 +51,7 @@ import (
 ```go
 func RandBytes(length int) []byte
 ```
+
 <b>Example:</b>

 ```go
@@ -45,17 +59,17 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
-	randBytes := random.RandBytes(4)
-	fmt.Println(randBytes)
+    randBytes := random.RandBytes(4)
+    fmt.Println(randBytes)
 }
 ```

-
 ### <span id="RandInt">RandInt</span>
+
 <p>Generate random int between min and max, may contain min, not max.</p>

 <b>Signature:</b>
@@ -63,6 +77,7 @@ func main() {
 ```go
 func RandInt(min, max int) int
 ```
+
 <b>Example:</b>

 ```go
@@ -70,25 +85,25 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
-	rInt := random.RandInt(1, 10)
-	fmt.Println(rInt)
+    rInt := random.RandInt(1, 10)
+    fmt.Println(rInt)
 }
 ```

+### <span id="RandString">RandString</span>

-
-### <span id="RandString">RandInt</span>
-<p>Generate random given length string.</p>
+<p>Generate random given length string. only contains letter (a-zA-Z)</p>

 <b>Signature:</b>

 ```go
 func RandString(length int) string
 ```
+
 <b>Example:</b>

 ```go
@@ -96,19 +111,121 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
-	randStr := random.RandString(6)
-	fmt.Println(randStr)
+    randStr := random.RandString(6)
+    fmt.Println(randStr) //pGWsze
 }
 ```

+### <span id="RandUpper">RandUpper</span>

+<p>Generate a random upper case string</p>

+<b>Signature:</b>
+
+```go
+func RandUpper(length int) string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    randStr := random.RandString(6)
+    fmt.Println(randStr) //PACWGF
+}
+```
+
+### <span id="RandLower">RandLower</span>
+
+<p>Generate a random lower case string</p>
+
+<b>Signature:</b>
+
+```go
+func RandLower(length int) string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    randStr := random.RandLower(6)
+    fmt.Println(randStr) //siqbew
+}
+```
+
+### <span id="RandNumeral">RandNumeral</span>
+
+<p>Generate a random numeral string</p>
+
+<b>Signature:</b>
+
+```go
+func RandNumeral(length int) string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    randStr := random.RandNumeral(6)
+    fmt.Println(randStr) //035172
+}
+```
+
+### <span id="RandNumeralOrLetter">RandNumeralOrLetter</span>
+
+<p>generate a random numeral or letter string</p>
+
+<b>Signature:</b>
+
+```go
+func RandNumeralOrLetter(length int) string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    randStr := random.RandNumeralOrLetter(6)
+    fmt.Println(randStr) //0aW7cQ
+}
+```

 ### <span id="UUIdV4">UUIdV4</span>
+
 <p>Generate a random UUID of version 4 according to RFC 4122.</p>

 <b>Signature:</b>
@@ -116,6 +233,7 @@ func main() {
 ```go
 func UUIdV4() (string, error)
 ```
+
 <b>Example:</b>

 ```go
@@ -123,16 +241,199 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
-	uuid, err := random.UUIdV4()
+    uuid, err := random.UUIdV4()
    if err != nil {
        return
    }
-	fmt.Println(uuid)
+    fmt.Println(uuid)
 }
 ```

+### <span id="RandFloat">RandFloat</span>

+<p>Generate a random float64 number between [min, max) with specific precision.</p>
+
+<b>Signature:</b>
+
+```go
+func RandFloat(min, max float64, precision int) float64
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/zbD_tuobJtr)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    floatNumber := random.RandFloat(1.0, 5.0, 2)
+    fmt.Println(floatNumber) //2.14 (random number)
+}
+```
+
+### <span id="RandFloats">RandFloats</span>
+
+<p>Generate a slice of random float64 numbers of length n that do not repeat. Number range in [min, max)</p>
+
+<b>Signature:</b>
+
+```go
+func RandFloats(length int, min, max float64, precision int) []float64
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/I3yndUQ-rhh)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    floatNumbers := random.RandFloats(5, 1.0, 5.0, 2)
+    fmt.Println(floatNumbers) //[3.42 3.99 1.3 2.38 4.23] (random)
+}
+```
+
+### <span id="RandUniqueIntSlice">RandUniqueIntSlice</span>
+
+<p>Generate a slice of random int of length n that do not repeat.</p>
+
+<b>Signature:</b>
+
+```go
+func RandUniqueIntSlice(n, min, max int) []int
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    result := RandUniqueIntSlice(5, 0, 10)
+    fmt.Println(result) //[0 4 7 1 5] (random)
+}
+```
+
+### <span id="RandIntSlice">RandIntSlice</span>
+
+<p>Generate a slice of random int. Number range in [min, max)</p>
+
+<b>Signature:</b>
+
+```go
+func RandIntSlice(length, min, max int) []int
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    result := random.RandIntSlice(5, 0, 10)
+    fmt.Println(result) //[1 4 7 1 5] (random)
+}
+```
+
+### <span id="RandStringSlice">RandStringSlice</span>
+
+<p>Generate a slice of random string of length strLen based on charset. chartset should be one of the following: random.Numeral, random.LowwerLetters, random.UpperLetters random.Letters, random.SymbolChars, random.AllChars. or a combination of them.</p>
+
+<b>Signature:</b>
+
+```go
+func RandStringSlice(charset string, sliceLen, strLen int) []string
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    strs := random.RandStringSlice(random.Letters, 4, 6)
+    fmt.Println(strs)
+
+    // output random string slice like below:
+    //[CooSMq RUFjDz FAeMPf heRyGv]
+}
+```
+
+### <span id="RandBool">RandBool</span>
+
+<p>Generate a random boolean value (true or false).</p>
+
+<b>Signature:</b>
+
+```go
+func RandBool() bool
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    result := random.RandBool()
+    fmt.Println(result) // true or false (random)
+}
+```
+
+### <span id="RandBoolSlice">RandBoolSlice</span>
+
+<p>Generates a random boolean slice of specified length.</p>
+
+<b>Signature:</b>
+
+```go
+func RandBoolSlice(length int) []bool
+```
+
+<b>Example:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    result := random.RandBoolSlice(2)
+    fmt.Println(result) // [true false] (random)
+}
+```
--- a/docs/random_zh-CN.md
+++ b/docs/random_zh-CN.md
@@ -1,37 +1,49 @@
 # Random
-random随机数生成器包，可以生成随机[]bytes, int, string。
+
+random 随机数生成器包，可以生成随机[]bytes, int, string。

 <div STYLE="page-break-after: always;"></div>

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/random/random.go](https://github.com/duke-git/lancet/blob/main/random/random.go)
-
+[https://github.com/duke-git/lancet/blob/v1/random/random.go](https://github.com/duke-git/lancet/blob/v1/random/random.go)

 <div STYLE="page-break-after: always;"></div>

 ## 用法:
+
 ```go
 import (
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )
 ```

 <div STYLE="page-break-after: always;"></div>

 ## 目录
- [RandBytes](#RandBytes)
- [RandInt](#RandInt)
- [RandString](#RandString)
- [UUIdV4](#UUIdV4)

+-   [RandBytes](#RandBytes)
+-   [RandInt](#RandInt)
+-   [RandString](#RandString)
+-   [RandUpper](#RandUpper)
+-   [RandLower](#RandLower)
+-   [RandNumeral](#RandNumeral)
+-   [RandNumeralOrLetter](#RandNumeralOrLetter)
+-   [UUIdV4](#UUIdV4)
+-   [RandFloat](#RandFloat)
+-   [RandFloats](#RandFloats)
+-   [RandUniqueIntSlice](#RandUniqueIntSlice)
+-   [RandIntSlice](#RandIntSlice)
+-   [RandStringSlice](#RandStringSlice)
+-   [RandBool](#RandBool)
+-   [RandBoolSlice](#RandBoolSlice)

 <div STYLE="page-break-after: always;"></div>

 ## 文档

-
 ### <span id="RandBytes">RandBytes</span>
+
 <p>生成随机字节切片</p>

 <b>函数签名:</b>
@@ -39,6 +51,7 @@ import (
 ```go
 func RandBytes(length int) []byte
 ```
+
 <b>例子:</b>

 ```go
@@ -46,17 +59,17 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
-	randBytes := random.RandBytes(4)
-	fmt.Println(randBytes)
+    randBytes := random.RandBytes(4)
+    fmt.Println(randBytes)
 }
 ```

-
 ### <span id="RandInt">RandInt</span>
+
 <p>生成随机int, 范围[min, max)</p>

 <b>函数签名:</b>
@@ -64,6 +77,7 @@ func main() {
 ```go
 func RandInt(min, max int) int
 ```
+
 <b>例子:</b>

 ```go
@@ -71,25 +85,25 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
-	rInt := random.RandInt(1, 10)
-	fmt.Println(rInt)
+    rInt := random.RandInt(1, 10)
+    fmt.Println(rInt)
 }
 ```

+### <span id="RandString">RandString</span>

-
-### <span id="RandString">RandInt</span>
-<p>生成随机给定长度的随机字符串</p>
+<p>生成给定长度的随机字符串，只包含字母(a-zA-Z)</p>

 <b>函数签名:</b>

 ```go
 func RandString(length int) string
 ```
+
 <b>例子:</b>

 ```go
@@ -97,18 +111,121 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
-	randStr := random.RandString(6)
-	fmt.Println(randStr)
+    randStr := random.RandString(6)
+    fmt.Println(randStr) //pGWsze
 }
 ```

+### <span id="RandUpper">RandUpper</span>

+<p>生成给定长度的随机大写字母字符串</p>
+
+<b>函数签名:</b>
+
+```go
+func RandUpper(length int) string
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    randStr := random.RandString(6)
+    fmt.Println(randStr) //PACWGF
+}
+```
+
+### <span id="RandLower">RandLower</span>
+
+<p>生成给定长度的随机小写字母字符串</p>
+
+<b>函数签名:</b>
+
+```go
+func RandLower(length int) string
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    randStr := random.RandLower(6)
+    fmt.Println(randStr) //siqbew
+}
+```
+
+### <span id="RandNumeral">RandNumeral</span>
+
+<p>生成给定长度的随机数字字符串</p>
+
+<b>函数签名:</b>
+
+```go
+func RandNumeral(length int) string
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    randStr := random.RandNumeral(6)
+    fmt.Println(randStr) //035172
+}
+```
+
+### <span id="RandNumeralOrLetter">RandNumeralOrLetter</span>
+
+<p>生成给定长度的随机字符串（数字+字母)</p>
+
+<b>函数签名:</b>
+
+```go
+func RandNumeralOrLetter(length int) string
+```
+
+<b>例子:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    randStr := random.RandNumeralOrLetter(6)
+    fmt.Println(randStr) //0aW7cQ
+}
+```

 ### <span id="UUIdV4">UUIdV4</span>
+
 <p>生成UUID v4字符串</p>

 <b>函数签名:</b>
@@ -116,6 +233,7 @@ func main() {
 ```go
 func UUIdV4() (string, error)
 ```
+
 <b>例子:</b>

 ```go
@@ -123,16 +241,199 @@ package main

 import (
    "fmt"
-    "github.com/duke-git/lancet/v2/random"
+    "github.com/duke-git/lancet/random"
 )

 func main() {
-	uuid, err := random.UUIdV4()
+    uuid, err := random.UUIdV4()
    if err != nil {
        return
    }
-	fmt.Println(uuid)
+    fmt.Println(uuid)
 }
 ```

+### <span id="RandFloat">RandFloat</span>

+<p>Generate a random float64 number between [min, max) with specific precision.</p>
+
+<b>Signature:</b>
+
+```go
+func RandFloat(min, max float64, precision int) float64
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/zbD_tuobJtr)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    floatNumber := random.RandFloat(1.0, 5.0, 2)
+    fmt.Println(floatNumber) //2.14 (random number)
+}
+```
+
+### <span id="RandFloats">RandFloats</span>
+
+<p>Generate a slice of random float64 numbers of length n that do not repeat. Number range in [min, max)</p>
+
+<b>Signature:</b>
+
+```go
+func RandFloats(length int, min, max float64, precision int) []float64
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/I3yndUQ-rhh)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    floatNumbers := random.RandFloats(5, 1.0, 5.0, 2)
+    fmt.Println(floatNumbers) //[3.42 3.99 1.3 2.38 4.23] (random)
+}
+```
+
+### <span id="RandUniqueIntSlice">RandUniqueIntSlice</span>
+
+<p>生成一个不重复的长度为n的随机int切片。</p>
+
+<b>函数签名:</b>
+
+```go
+func RandUniqueIntSlice(n, min, max int) []int
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    result := RandUniqueIntSlice(5, 0, 10)
+    fmt.Println(result) //[0 4 7 1 5] (random)
+}
+```
+
+### <span id="RandIntSlice">RandIntSlice</span>
+
+<p>生成一个特定长度的随机int切片，数值范围[min, max)。</p>
+
+<b>函数签名:</b>
+
+```go
+func RandIntSlice(length, min, max int) []int
+```
+
+<b>示例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    result := random.RandIntSlice(5, 0, 10)
+    fmt.Println(result) //[1 2 7 1 5] (random)
+}
+```
+
+### <span id="RandStringSlice">RandStringSlice</span>
+
+<p>生成随机字符串slice. 字符串类型需要是以下几种或者它们的组合: random.Numeral, random.LowwerLetters, random.UpperLetters random.Letters, random.SymbolChars, random.AllChars。</p>
+
+<b>函数签名:</b>
+
+```go
+func RandStringSlice(charset string, sliceLen, strLen int) []string
+```
+
+<b>实例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    strs := random.RandStringSlice(random.Letters, 4, 6)
+    fmt.Println(strs)
+
+    // output random string slice like below:
+    //[CooSMq RUFjDz FAeMPf heRyGv]
+}
+```
+
+### <span id="RandBool">RandBool</span>
+
+<p>生成随机bool值(true or false)。</p>
+
+<b>函数签名:</b>
+
+```go
+func RandBool() bool
+```
+
+<b>实例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    result := random.RandBool()
+    fmt.Println(result) // true or false (random)
+}
+```
+
+### <span id="RandBoolSlice">RandBoolSlice</span>
+
+<p>生成特定长度的随机bool slice。</p>
+
+<b>函数签名:</b>
+
+```go
+func RandBoolSlice(length int) []bool
+```
+
+<b>实例:</b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/random"
+)
+
+func main() {
+    result := random.RandBoolSlice(2)
+    fmt.Println(result) // [true false] (random)
+}
+```
--- a/docs/retry.md
+++ b/docs/retry.md
@@ -1,37 +1,39 @@
 # Retry
+
 Package retry is for executing a function repeatedly until it was successful or canceled by the context.

 <div STYLE="page-break-after: always;"></div>

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/retry/retry.go](https://github.com/duke-git/lancet/blob/main/retry/retry.go)
-
+[https://github.com/duke-git/lancet/blob/v1/retry/retry.go](https://github.com/duke-git/lancet/blob/v1/retry/retry.go)

 <div STYLE="page-break-after: always;"></div>

 ## Usage:
+
 ```go
 import (
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )
 ```

 <div STYLE="page-break-after: always;"></div>

 ## Index
- [Context](#Context)
- [Retry](#Retry)
- [RetryFunc](#RetryFunc)
- [RetryDuration](#RetryDuration)
- [RetryTimes](#RetryTimes)
+
+-   [Context](#Context)
+-   [Retry](#Retry)
+-   [RetryFunc](#RetryFunc)
+-   [RetryDuration](#RetryDuration)
+-   [RetryTimes](#RetryTimes)

 <div STYLE="page-break-after: always;"></div>

 ## Documentation

-
 ### <span id="Context">Context</span>
+
 <p>Set retry context config, can cancel the retry with context.</p>

 <b>Signature:</b>
@@ -39,43 +41,42 @@ import (
 ```go
 func Context(ctx context.Context)
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"context"
-	"errors"
-	"fmt"
-	"github.com/duke-git/lancet/v2/retry"
-	"time"
+    "context"
+    "errors"
+    "fmt"
+    "github.com/duke-git/lancet/retry"
+    "time"
 )

 func main() {
-	ctx, cancel := context.WithCancel(context.TODO())
-	var number int
-	increaseNumber := func() error {
-		number++
-		if number > 3 {
-			cancel()
-		}
-		return errors.New("error occurs")
-	}
+    ctx, cancel := context.WithCancel(context.TODO())
+    var number int
+    increaseNumber := func() error {
+        number++
+        if number > 3 {
+            cancel()
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber,
-		retry.RetryDuration(time.Microsecond*50),
-		retry.Context(ctx),
-	)
+    err := retry.Retry(increaseNumber,
+        retry.RetryDuration(time.Microsecond*50),
+        retry.Context(ctx),
+    )

-	if err != nil {
-		fmt.Println(err) //retry is cancelled
-	}
+    if err != nil {
+        fmt.Println(err) //retry is cancelled
+    }
 }
 ```

-
-
-
 ### <span id="RetryFunc">RetryFunc</span>
+
 <p>Function that retry executes.</p>

 <b>Signature:</b>
@@ -83,6 +84,7 @@ func main() {
 ```go
 type RetryFunc func() error
 ```
+
 <b>Example:</b>

 ```go
@@ -92,32 +94,31 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
    var number int
    var increaseNumber retry.RetryFunc
-	increaseNumber = func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    increaseNumber = func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
+    err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
    if err != nil {
-		log.Fatal(err)
-	}
+        log.Fatal(err)
+    }

    fmt.Println(number) //3
 }
 ```

-
-
 ### <span id="RetryTimes">RetryTimes</span>
+
 <p>Set times of retry. Default times is 5.</p>

 <b>Signature:</b>
@@ -125,6 +126,7 @@ func main() {
 ```go
 func RetryTimes(n uint)
 ```
+
 <b>Example:</b>

 ```go
@@ -134,29 +136,28 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
    var number int
-	increaseNumber := func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    increaseNumber := func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber, retry.RetryTimes(2))
+    err := retry.Retry(increaseNumber, retry.RetryTimes(2))
    if err != nil {
-		log.Fatal(err) //2022/02/01 18:42:25 function main.main.func1 run failed after 2 times retry exit status 1
-	}
+        log.Fatal(err) //2022/02/01 18:42:25 function main.main.func1 run failed after 2 times retry exit status 1
+    }
 }
 ```

-
-
 ### <span id="RetryDuration">RetryDuration</span>
+
 <p>Set duration of retries. Default duration is 3 second.</p>

 <b>Signature:</b>
@@ -164,6 +165,7 @@ func main() {
 ```go
 func RetryDuration(d time.Duration)
 ```
+
 <b>Example:</b>

 ```go
@@ -173,30 +175,30 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
    var number int
-	increaseNumber := func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    increaseNumber := func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
+    err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
    if err != nil {
-		log.Fatal(err)
-	}
+        log.Fatal(err)
+    }

    fmt.Println(number) //3
 }
 ```

-
 ### <span id="Retry">Retry</span>
+
 <p>Executes the retryFunc repeatedly until it was successful or canceled by the context.</p>

 <b>Signature:</b>
@@ -204,6 +206,7 @@ func main() {
 ```go
 func Retry(retryFunc RetryFunc, opts ...Option) error
 ```
+
 <b>Example:</b>

 ```go
@@ -213,23 +216,23 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
    var number int
-	increaseNumber := func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    increaseNumber := func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
+    err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
    if err != nil {
-		log.Fatal(err)
-	}
+        log.Fatal(err)
+    }

    fmt.Println(number) //3
 }
--- a/docs/retry_zh-CN.md
+++ b/docs/retry_zh-CN.md
@@ -1,39 +1,39 @@
 # Retry
-retry重试执行函数直到函数运行成功或被context cancel。
+
+retry 重试执行函数直到函数运行成功或被 context cancel。

 <div STYLE="page-break-after: always;"></div>

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/retry/retry.go](https://github.com/duke-git/lancet/blob/main/retry/retry.go)
-
+[https://github.com/duke-git/lancet/blob/v1/retry/retry.go](https://github.com/duke-git/lancet/blob/v1/retry/retry.go)

 <div STYLE="page-break-after: always;"></div>

 ## 用法:
+
 ```go
 import (
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )
 ```

 <div STYLE="page-break-after: always;"></div>

 ## 目录
- [Context](#Context)
- [Retry](#Retry)
- [RetryFunc](#RetryFunc)
- [RetryDuration](#RetryDuration)
- [RetryTimes](#RetryTimes)

+-   [Context](#Context)
+-   [Retry](#Retry)
+-   [RetryFunc](#RetryFunc)
+-   [RetryDuration](#RetryDuration)
+-   [RetryTimes](#RetryTimes)

 <div STYLE="page-break-after: always;"></div>

-
-## Document文档
-
+## Document 文档

 ### <span id="Context">Context</span>
+
 <p>设置重试context参数</p>

 <b>函数签名:</b>
@@ -41,43 +41,42 @@ import (
 ```go
 func Context(ctx context.Context)
 ```
+
 <b>例子:</b>

 ```go
 import (
-	"context"
-	"errors"
-	"fmt"
-	"lancet-demo/retry"
-	"time"
+    "context"
+    "errors"
+    "fmt"
+    "lancet-demo/retry"
+    "time"
 )

 func main() {
-	ctx, cancel := context.WithCancel(context.TODO())
-	var number int
-	increaseNumber := func() error {
-		number++
-		if number > 3 {
-			cancel()
-		}
-		return errors.New("error occurs")
-	}
+    ctx, cancel := context.WithCancel(context.TODO())
+    var number int
+    increaseNumber := func() error {
+        number++
+        if number > 3 {
+            cancel()
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber,
-		retry.RetryDuration(time.Microsecond*50),
-		retry.Context(ctx),
-	)
+    err := retry.Retry(increaseNumber,
+        retry.RetryDuration(time.Microsecond*50),
+        retry.Context(ctx),
+    )

-	if err != nil {
-		fmt.Println(err) //retry is cancelled
-	}
+    if err != nil {
+        fmt.Println(err) //retry is cancelled
+    }
 }
 ```

-
-
-
 ### <span id="RetryFunc">RetryFunc</span>
+
 <p>被重试执行的函数</p>

 <b>函数签名:</b>
@@ -85,6 +84,7 @@ func main() {
 ```go
 type RetryFunc func() error
 ```
+
 <b>例子:</b>

 ```go
@@ -94,32 +94,31 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
    var number int
    var increaseNumber retry.RetryFunc
-	increaseNumber = func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    increaseNumber = func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
+    err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
    if err != nil {
-		log.Fatal(err)
-	}
+        log.Fatal(err)
+    }

    fmt.Println(number) //3
 }
 ```

-
-
 ### <span id="RetryTimes">RetryTimes</span>
+
 <p>设置重试次数，默认5</p>

 <b>函数签名:</b>
@@ -127,6 +126,7 @@ func main() {
 ```go
 func RetryTimes(n uint)
 ```
+
 <b>例子:</b>

 ```go
@@ -136,29 +136,28 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
    var number int
-	increaseNumber := func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    increaseNumber := func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber, retry.RetryTimes(2))
+    err := retry.Retry(increaseNumber, retry.RetryTimes(2))
    if err != nil {
-		log.Fatal(err) //2022/02/01 18:42:25 function main.main.func1 run failed after 2 times retry exit status 1
-	}
+        log.Fatal(err) //2022/02/01 18:42:25 function main.main.func1 run failed after 2 times retry exit status 1
+    }
 }
 ```

-
-
 ### <span id="RetryDuration">RetryDuration</span>
+
 <p>设置重试间隔时间，默认3秒</p>

 <b>函数签名:</b>
@@ -166,6 +165,7 @@ func main() {
 ```go
 func RetryDuration(d time.Duration)
 ```
+
 <b>例子:</b>

 ```go
@@ -175,30 +175,30 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
    var number int
-	increaseNumber := func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    increaseNumber := func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
+    err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
    if err != nil {
-		log.Fatal(err)
-	}
+        log.Fatal(err)
+    }

    fmt.Println(number) //3
 }
 ```

-
 ### <span id="Retry">Retry</span>
+
 <p>重试执行函数retryFunc，直到函数运行成功，或被context停止</p>

 <b>函数签名:</b>
@@ -206,6 +206,7 @@ func main() {
 ```go
 func Retry(retryFunc RetryFunc, opts ...Option) error
 ```
+
 <b>例子:</b>

 ```go
@@ -215,23 +216,23 @@ import (
    "fmt"
    "errors"
    "log"
-    "github.com/duke-git/lancet/v2/retry"
+    "github.com/duke-git/lancet/retry"
 )

 func main() {
    var number int
-	increaseNumber := func() error {
-		number++
-		if number == 3 {
-			return nil
-		}
-		return errors.New("error occurs")
-	}
+    increaseNumber := func() error {
+        number++
+        if number == 3 {
+            return nil
+        }
+        return errors.New("error occurs")
+    }

-	err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
+    err := retry.Retry(increaseNumber, retry.RetryDuration(time.Microsecond*50))
    if err != nil {
-		log.Fatal(err)
-	}
+        log.Fatal(err)
+    }

    fmt.Println(number) //3
 }
--- a/docs/slice.md
+++ b/docs/slice.md
--- a/docs/slice_zh-CN.md
+++ b/docs/slice_zh-CN.md
--- a/docs/strutil.md
+++ b/docs/strutil.md
--- a/docs/strutil_zh-CN.md
+++ b/docs/strutil_zh-CN.md
--- a/docs/system.md
+++ b/docs/system.md
@@ -1,41 +1,43 @@
 # System
+
 Package system contains some functions about os, runtime, shell command.

 <div STYLE="page-break-after: always;"></div>

 ## Source:

- [https://github.com/duke-git/lancet/blob/main/system/os.go](https://github.com/duke-git/lancet/blob/main/system/os.go)
-
+[https://github.com/duke-git/lancet/blob/v1/system/os.go](https://github.com/duke-git/lancet/blob/v1/system/os.go)

 <div STYLE="page-break-after: always;"></div>

 ## Usage:
+
 ```go
 import (
-    "github.com/duke-git/lancet/v2/system"
+    "github.com/duke-git/lancet/system"
 )
 ```

 <div STYLE="page-break-after: always;"></div>

 ## Index
- [IsWindows](#IsWindows)
- [IsLinux](#IsLinux)
- [IsMac](#IsMac)
- [GetOsEnv](#GetOsEnv)
- [SetOsEnv](#SetOsEnv)
- [RemoveOsEnv](#RemoveOsEnv)
- [CompareOsEnv](#CompareOsEnv)
- [ExecCommand](#ExecCommand)
-  
+
+-   [IsWindows](#IsWindows)
+-   [IsLinux](#IsLinux)
+-   [IsMac](#IsMac)
+-   [GetOsEnv](#GetOsEnv)
+-   [SetOsEnv](#SetOsEnv)
+-   [RemoveOsEnv](#RemoveOsEnv)
+-   [CompareOsEnv](#CompareOsEnv)
+-   [ExecCommand](#ExecCommand)
+-   [GetOsBits](#GetOsBits)

 <div STYLE="page-break-after: always;"></div>

 ## Documentation

-
 ### <span id="IsWindows">IsWindows</span>
+
 <p>Check if current os is windows.</p>

 <b>Signature:</b>
@@ -43,24 +45,23 @@ import (
 ```go
 func IsWindows() bool
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	isOsWindows := system.IsWindows()
-	fmt.Println(isOsWindows)
+    isOsWindows := system.IsWindows()
+    fmt.Println(isOsWindows)
 }
 ```

-
-
-
 ### <span id="IsLinux">IsLinux</span>
+
 <p>Check if current os is linux.</p>

 <b>Signature:</b>
@@ -68,23 +69,23 @@ func main() {
 ```go
 func IsLinux() bool
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	isOsLinux := system.IsLinux()
-	fmt.Println(isOsLinux)
+    isOsLinux := system.IsLinux()
+    fmt.Println(isOsLinux)
 }
 ```

-
-
 ### <span id="IsMac">IsMac</span>
+
 <p>Check if current os is macos.</p>

 <b>Signature:</b>
@@ -92,23 +93,23 @@ func main() {
 ```go
 func IsMac() bool
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	isOsMac := system.IsMac
-	fmt.Println(isOsMac)
+    isOsMac := system.IsMac
+    fmt.Println(isOsMac)
 }
 ```

-
-
 ### <span id="GetOsEnv">GetOsEnv</span>
+
 <p>Gets the value of the environment variable named by the key.</p>

 <b>Signature:</b>
@@ -116,23 +117,23 @@ func main() {
 ```go
 func GetOsEnv(key string) string
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	fooEnv := system.GetOsEnv("foo")
-	fmt.Println(fooEnv)
+    fooEnv := system.GetOsEnv("foo")
+    fmt.Println(fooEnv)
 }
 ```

-
-
 ### <span id="SetOsEnv">SetOsEnv</span>
+
 <p>Sets the value of the environment variable named by the key.</p>

 <b>Signature:</b>
@@ -140,24 +141,23 @@ func main() {
 ```go
 func SetOsEnv(key, value string) error
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	err := system.SetOsEnv("foo", "foo_value")
-	fmt.Println(err)
+    err := system.SetOsEnv("foo", "foo_value")
+    fmt.Println(err)
 }
 ```

-
-
-
 ### <span id="RemoveOsEnv">RemoveOsEnv</span>
+
 <p>Remove a single environment variable.</p>

 <b>Signature:</b>
@@ -165,25 +165,25 @@ func main() {
 ```go
 func RemoveOsEnv(key string) error
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	err := system.RemoveOsEnv("foo")
-	if err != nil {
-		fmt.Println(err)
-	}
+    err := system.RemoveOsEnv("foo")
+    if err != nil {
+        fmt.Println(err)
+    }
 }
 ```

-
-
 ### <span id="CompareOsEnv">CompareOsEnv</span>
+
 <p>Get env named by the key and compare it with comparedEnv.</p>

 <b>Signature:</b>
@@ -191,52 +191,71 @@ func main() {
 ```go
 func CompareOsEnv(key, comparedEnv string) bool
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	system.SetOsEnv("foo", "foo_value")
-	res := system.CompareOsEnv("foo", "foo_value")
-	fmt.Println(res) //true
+    system.SetOsEnv("foo", "foo_value")
+    res := system.CompareOsEnv("foo", "foo_value")
+    fmt.Println(res) //true
 }
 ```

+### <span id="ExecCommand">ExecCommand</span>

-
-
-### <span id="ExecCommand">CompareOsEnv</span>
 <p>use shell /bin/bash -c(linux) or cmd (windows) to execute command.</p>

 <b>Signature:</b>

 ```go
-func ExecCommand(command string) (stdout, stderr string, err error)
+type (
+	Option func(*exec.Cmd)
+)
+func ExecCommand(command string, opts ...Option) (stdout, stderr string, err error)
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	out, errout, err := system.ExecCommand("ls")
-	fmt.Println(out)
-	fmt.Println(errout)
-	fmt.Println(err)
+    out, errout, err := system.ExecCommand("ls", system.WithForeground())
+    fmt.Println(out)
+    fmt.Println(errout)
+    fmt.Println(err)
 }
 ```

+### <span id="GetOsBits">GetOsBits</span>

+<p>获取当前操作系统位数，返回32或64</p>

+<b>函数签名:</b>

+```go
+func GetOsBits() int
+```

+<b>例子:</b>

+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/system"
+)

-
+func main() {
+    osBit := system.GetOsBits()
+    fmt.Println(osBit)
+}
+```
--- a/docs/system_zh-CN.md
+++ b/docs/system_zh-CN.md
@@ -1,41 +1,43 @@
 # System
-system包含os, runtime, shell command相关函数。
+
+system 包含 os, runtime, shell command 相关函数。

 <div STYLE="page-break-after: always;"></div>

 ## 源码:

- [https://github.com/duke-git/lancet/blob/main/system/os.go](https://github.com/duke-git/lancet/blob/main/system/os.go)
-
+[https://github.com/duke-git/lancet/blob/v1/system/os.go](https://github.com/duke-git/lancet/blob/v1/system/os.go)

 <div STYLE="page-break-after: always;"></div>

 ## 用法:
+
 ```go
 import (
-    "github.com/duke-git/lancet/v2/system"
+    "github.com/duke-git/lancet/system"
 )
 ```

 <div STYLE="page-break-after: always;"></div>

 ## 目录
- [IsWindows](#IsWindows)
- [IsLinux](#IsLinux)
- [IsMac](#IsMac)
- [GetOsEnv](#GetOsEnv)
- [SetOsEnv](#SetOsEnv)
- [RemoveOsEnv](#RemoveOsEnv)
- [CompareOsEnv](#CompareOsEnv)
- [ExecCommand](#ExecCommand)
-  
+
+-   [IsWindows](#IsWindows)
+-   [IsLinux](#IsLinux)
+-   [IsMac](#IsMac)
+-   [GetOsEnv](#GetOsEnv)
+-   [SetOsEnv](#SetOsEnv)
+-   [RemoveOsEnv](#RemoveOsEnv)
+-   [CompareOsEnv](#CompareOsEnv)
+-   [ExecCommand](#ExecCommand)
+-   [GetOsBits](#GetOsBits)

 <div STYLE="page-break-after: always;"></div>

-## Documentation文档
-
+## Documentation 文档

 ### <span id="IsWindows">IsWindows</span>
+
 <p>检查当前操作系统是否是windows</p>

 <b>Signature:</b>
@@ -43,24 +45,23 @@ import (
 ```go
 func IsWindows() bool
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	isOsWindows := system.IsWindows()
-	fmt.Println(isOsWindows)
+    isOsWindows := system.IsWindows()
+    fmt.Println(isOsWindows)
 }
 ```

-
-
-
 ### <span id="IsLinux">IsLinux</span>
+
 <p>检查当前操作系统是否是linux</p>

 <b>Signature:</b>
@@ -68,23 +69,23 @@ func main() {
 ```go
 func IsLinux() bool
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	isOsLinux := system.IsLinux()
-	fmt.Println(isOsLinux)
+    isOsLinux := system.IsLinux()
+    fmt.Println(isOsLinux)
 }
 ```

-
-
 ### <span id="IsMac">IsMac</span>
+
 <p>检查当前操作系统是否是macos</p>

 <b>Signature:</b>
@@ -92,23 +93,23 @@ func main() {
 ```go
 func IsMac() bool
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	isOsMac := system.IsMac
-	fmt.Println(isOsMac)
+    isOsMac := system.IsMac
+    fmt.Println(isOsMac)
 }
 ```

-
-
 ### <span id="GetOsEnv">GetOsEnv</span>
+
 <p>获取key命名的环境变量的值</p>

 <b>Signature:</b>
@@ -116,23 +117,23 @@ func main() {
 ```go
 func GetOsEnv(key string) string
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	fooEnv := system.GetOsEnv("foo")
-	fmt.Println(fooEnv)
+    fooEnv := system.GetOsEnv("foo")
+    fmt.Println(fooEnv)
 }
 ```

-
-
 ### <span id="SetOsEnv">SetOsEnv</span>
+
 <p>设置由key命名的环境变量的值</p>

 <b>Signature:</b>
@@ -140,24 +141,23 @@ func main() {
 ```go
 func SetOsEnv(key, value string) error
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	err := system.SetOsEnv("foo", "foo_value")
-	fmt.Println(err)
+    err := system.SetOsEnv("foo", "foo_value")
+    fmt.Println(err)
 }
 ```

-
-
-
 ### <span id="RemoveOsEnv">RemoveOsEnv</span>
+
 <p>删除单个环境变量</p>

 <b>Signature:</b>
@@ -165,25 +165,25 @@ func main() {
 ```go
 func RemoveOsEnv(key string) error
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	err := system.RemoveOsEnv("foo")
-	if err != nil {
-		fmt.Println(err)
-	}
+    err := system.RemoveOsEnv("foo")
+    if err != nil {
+        fmt.Println(err)
+    }
 }
 ```

-
-
 ### <span id="CompareOsEnv">CompareOsEnv</span>
+
 <p>获取key命名的环境变量值并与compareEnv进行比较</p>

 <b>Signature:</b>
@@ -191,52 +191,71 @@ func main() {
 ```go
 func CompareOsEnv(key, comparedEnv string) bool
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	system.SetOsEnv("foo", "foo_value")
-	res := system.CompareOsEnv("foo", "foo_value")
-	fmt.Println(res) //true
+    system.SetOsEnv("foo", "foo_value")
+    res := system.CompareOsEnv("foo", "foo_value")
+    fmt.Println(res) //true
 }
 ```

+### <span id="ExecCommand">ExecCommand</span>

-
-
-### <span id="ExecCommand">CompareOsEnv</span>
 <p>使用shell /bin/bash -c(linux) 或 cmd (windows) 执行shell命令</p>

 <b>Signature:</b>

 ```go
-func ExecCommand(command string) (stdout, stderr string, err error)
+type (
+	Option func(*exec.Cmd)
+)
+func ExecCommand(command string, opts ...Option) (stdout, stderr string, err error)
 ```
+
 <b>Example:</b>

 ```go
 import (
-	"fmt"
-	"github.com/duke-git/lancet/v2/system"
+    "fmt"
+    "github.com/duke-git/lancet/system"
 )

 func main() {
-	out, errout, err := system.ExecCommand("ls")
-	fmt.Println(out)
-	fmt.Println(errout)
-	fmt.Println(err)
+    out, errout, err := system.ExecCommand("ls", system.WithForeground())
+    fmt.Println(out)
+    fmt.Println(errout)
+    fmt.Println(err)
 }
 ```

+### <span id="GetOsBits">GetOsBits</span>

+<p>Get current os bits, 32bit or 64bit. return 32 or 64</p>

+<b>Signature:</b>

+```go
+func GetOsBits() int
+```

+<b>Example:</b>

+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/system"
+)

-
+func main() {
+    osBit := system.GetOsBits()
+    fmt.Println(osBit)
+}
+```
--- a/docs/validator.md
+++ b/docs/validator.md
--- a/docs/validator_zh-CN.md
+++ b/docs/validator_zh-CN.md
--- a/docs/xerror.md
+++ b/docs/xerror.md
@@ -1,57 +0,0 @@
-# Xerror
-Package xerror implements helpers for errors.
-
-<div STYLE="page-break-after: always;"></div>
-
-## Source:
-
- [https://github.com/duke-git/lancet/blob/main/xerror/xerror.go](https://github.com/duke-git/lancet/blob/main/xerror/xerror.go)
-
-<div STYLE="page-break-after: always;"></div>
-
-## Usage:
-```go
-import (
-    "github.com/duke-git/lancet/v2/xerror"
-)
-```
-
-<div STYLE="page-break-after: always;"></div>
-
-## Index
- [Unwrap](#Unwrap)
-
-<div STYLE="page-break-after: always;"></div>
-
-## Documentation
-
-
-
-### <span id="Unwrap">Unwrap</span>
-<p>Unwrap if err is nil then it returns a valid value. If err is not nil, Unwrap panics with err.</p>
-
-<b>Signature:</b>
-
-```go
-func Unwrap[T any](val T, err error) T
-```
-<b>Example:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/xerror"
-)
-
-func main() {
-    _, err := strconv.Atoi("4o2")
-	defer func() {
-		v := recover()
-		fmt.Println(err.Error()) // err.Error() == v.(*strconv.NumError).Error()
-	}()
-
-	xerror.Unwrap(strconv.Atoi("4o2"))
-}
-```
--- a/docs/xerror_zh-CN.md
+++ b/docs/xerror_zh-CN.md
@@ -1,57 +0,0 @@
-# Xerror
-xerror错误处理逻辑封装
-
-<div STYLE="page-break-after: always;"></div>
-
-## 源码:
-
- [https://github.com/duke-git/lancet/blob/main/xerror/xerror.go](https://github.com/duke-git/lancet/blob/main/xerror/xerror.go)
-
-<div STYLE="page-break-after: always;"></div>
-
-## 用法:
-```go
-import (
-    "github.com/duke-git/lancet/v2/xerror"
-)
-```
-
-<div STYLE="page-break-after: always;"></div>
-
-## 目录
- [Unwrap](#Unwrap)
-
-<div STYLE="page-break-after: always;"></div>
-
-## 文档
-
-
-
-### <span id="Unwrap">Unwrap</span>
-<p>如果err为nil则展开，则它返回一个有效值。 如果err不是nil则Unwrap使用err发生恐慌。</p>
-
-<b>函数签名:</b>
-
-```go
-func Unwrap[T any](val T, err error) T
-```
-<b>例子:</b>
-
-```go
-package main
-
-import (
-    "fmt"
-    "github.com/duke-git/lancet/v2/xerror"
-)
-
-func main() {
-    _, err := strconv.Atoi("4o2")
-	defer func() {
-		v := recover()
-		fmt.Println(err.Error()) // err.Error() == v.(*strconv.NumError).Error()
-	}()
-
-	xerror.Unwrap(strconv.Atoi("4o2"))
-}
-```
--- a/fileutil/file.go
+++ b/fileutil/file.go
@@ -7,14 +7,26 @@ package fileutil
 import (
 	"archive/zip"
 	"bufio"
+	"bytes"
+	"crypto/sha1"
+	"crypto/sha256"
+	"crypto/sha512"
+	"encoding/csv"
 	"errors"
+	"fmt"
 	"io"
 	"io/fs"
 	"io/ioutil"
+	"log"
 	"net/http"
 	"os"
 	"path/filepath"
+	"runtime"
+	"sort"
 	"strings"
+	"sync"
+
+	"github.com/duke-git/lancet/validator"
 )

 // IsExist checks if a file or directory exists
@@ -40,6 +52,11 @@ func CreateFile(path string) bool {
 	return true
 }

+// CreateDir create directory in absolute path. param `absPath` like /a/, /a/b/
+func CreateDir(absPath string) error {
+	return os.MkdirAll(absPath, os.ModePerm)
+}
+
 // IsDir checks if the path is directory or not
 func IsDir(path string) bool {
 	file, err := os.Stat(path)
@@ -81,7 +98,7 @@ func CopyFile(srcFilePath string, dstFilePath string) error {
 	}
 }

-//ClearFile write empty string to path file
+// ClearFile write empty string to path file
 func ClearFile(path string) error {
 	f, err := os.OpenFile(path, os.O_WRONLY|os.O_TRUNC, 0777)
 	if err != nil {
@@ -93,7 +110,7 @@ func ClearFile(path string) error {
 	return err
 }

-//ReadFileToString return string of file content
+// ReadFileToString return string of file content
 func ReadFileToString(path string) (string, error) {
 	bytes, err := ioutil.ReadFile(path)
 	if err != nil {
@@ -155,7 +172,15 @@ func ListFileNames(path string) ([]string, error) {
 }

 // Zip create zip file, fpath could be a single file or a directory
-func Zip(fpath string, destPath string) error {
+func Zip(path string, destPath string) error {
+	if IsDir(path) {
+		return zipFolder(path, destPath)
+	}
+
+	return zipFile(path, destPath)
+}
+
+func zipFile(filePath string, destPath string) error {
 	zipFile, err := os.Create(destPath)
 	if err != nil {
 		return err
@@ -165,7 +190,33 @@ func Zip(fpath string, destPath string) error {
 	archive := zip.NewWriter(zipFile)
 	defer archive.Close()

-	filepath.Walk(fpath, func(path string, info os.FileInfo, err error) error {
+	return addFileToArchive1(filePath, archive)
+}
+
+func zipFolder(folderPath string, destPath string) error {
+	outFile, err := os.Create(destPath)
+	if err != nil {
+		return err
+	}
+	defer outFile.Close()
+
+	w := zip.NewWriter(outFile)
+
+	err = addFileToArchive2(w, folderPath, "")
+	if err != nil {
+		return err
+	}
+
+	err = w.Close()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func addFileToArchive1(fpath string, archive *zip.Writer) error {
+	err := filepath.Walk(fpath, func(path string, info os.FileInfo, err error) error {
 		if err != nil {
 			return err
 		}
@@ -181,26 +232,53 @@ func Zip(fpath string, destPath string) error {
 			header.Name += "/"
 		} else {
 			header.Method = zip.Deflate
-		}
-
-		writer, err := archive.CreateHeader(header)
-		if err != nil {
-			return err
-		}
-
-		if !info.IsDir() {
+			writer, err := archive.CreateHeader(header)
+			if err != nil {
+				return err
+			}
 			file, err := os.Open(path)
 			if err != nil {
 				return err
 			}
 			defer file.Close()
-			_, err = io.Copy(writer, file)
-			if err != nil {
+			if _, err := io.Copy(writer, file); err != nil {
 				return err
 			}
 		}
 		return nil
 	})
+	return err
+}
+
+func addFileToArchive2(w *zip.Writer, basePath, baseInZip string) error {
+	files, err := os.ReadDir(basePath)
+	if err != nil {
+		return err
+	}
+	if !strings.HasSuffix(basePath, "/") {
+		basePath = basePath + "/"
+	}
+
+	for _, file := range files {
+		if !file.IsDir() {
+			dat, err := os.ReadFile(basePath + file.Name())
+			if err != nil {
+				return err
+			}
+
+			f, err := w.Create(baseInZip + file.Name())
+			if err != nil {
+				return err
+			}
+			_, err = f.Write(dat)
+			if err != nil {
+				return err
+			}
+		} else if file.IsDir() {
+			newBase := basePath + file.Name() + "/"
+			addFileToArchive2(w, newBase, baseInZip+file.Name()+"/")
+		}
+	}

 	return nil
 }
@@ -214,7 +292,11 @@ func UnZip(zipFile string, destPath string) error {
 	defer zipReader.Close()

 	for _, f := range zipReader.File {
-		path := filepath.Join(destPath, f.Name)
+		//issue#62: fix ZipSlip bug
+		path, err := safeFilepathJoin(destPath, f.Name)
+		if err != nil {
+			return err
+		}
 		if f.FileInfo().IsDir() {
 			os.MkdirAll(path, os.ModePerm)
 		} else {
@@ -243,6 +325,75 @@ func UnZip(zipFile string, destPath string) error {
 	return nil
 }

+// ZipAppendEntry append a single file or directory by fpath to an existing zip file.
+// Play: https://go.dev/play/p/cxvaT8TRNQp
+func ZipAppendEntry(fpath string, destPath string) error {
+	tempFile, err := os.CreateTemp("", "temp.zip")
+	if err != nil {
+		return err
+	}
+	defer os.Remove(tempFile.Name())
+
+	zipReader, err := zip.OpenReader(destPath)
+	if err != nil {
+		return err
+	}
+
+	archive := zip.NewWriter(tempFile)
+
+	for _, zipItem := range zipReader.File {
+		zipItemReader, err := zipItem.Open()
+		if err != nil {
+			return err
+		}
+		header, err := zip.FileInfoHeader(zipItem.FileInfo())
+		if err != nil {
+			return err
+		}
+		header.Name = zipItem.Name
+		targetItem, err := archive.CreateHeader(header)
+		if err != nil {
+			return err
+		}
+		_, err = io.Copy(targetItem, zipItemReader)
+		if err != nil {
+			return err
+		}
+	}
+
+	err = addFileToArchive1(fpath, archive)
+
+	if err != nil {
+		return err
+	}
+
+	err = zipReader.Close()
+	if err != nil {
+		return err
+	}
+	err = archive.Close()
+	if err != nil {
+		return err
+	}
+	err = tempFile.Close()
+	if err != nil {
+		return err
+	}
+
+	return CopyFile(tempFile.Name(), destPath)
+}
+
+func safeFilepathJoin(path1, path2 string) (string, error) {
+	relPath, err := filepath.Rel(".", path2)
+	if err != nil || strings.HasPrefix(relPath, "..") {
+		return "", fmt.Errorf("(zipslip) filepath is unsafe %q: %v", path2, err)
+	}
+	if path1 == "" {
+		path1 = "."
+	}
+	return filepath.Join(path1, filepath.Join("/", relPath)), nil
+}
+
 // IsLink checks if a file is symbol link or not
 func IsLink(path string) bool {
 	fi, err := os.Lstat(path)
@@ -263,7 +414,7 @@ func FileMode(path string) (fs.FileMode, error) {

 // MiMeType return file mime type
 // param `file` should be string(file path) or *os.File
-func MiMeType(file any) string {
+func MiMeType(file interface{}) string {
 	var mediatype string

 	readBuffer := func(f *os.File) ([]byte, error) {
@@ -296,3 +447,338 @@ func MiMeType(file any) string {
 	}
 	return mediatype
 }
+
+// CurrentPath return current absolute path.
+func CurrentPath() string {
+	var absPath string
+	_, filename, _, ok := runtime.Caller(1)
+	if ok {
+		absPath = filepath.Dir(filename)
+	}
+
+	return absPath
+}
+
+// IsZipFile checks if file is zip or not.
+func IsZipFile(filepath string) bool {
+	f, err := os.Open(filepath)
+	if err != nil {
+		return false
+	}
+	defer f.Close()
+
+	buf := make([]byte, 4)
+	if n, err := f.Read(buf); err != nil || n < 4 {
+		return false
+	}
+
+	return bytes.Equal(buf, []byte("PK\x03\x04"))
+}
+
+// FileSize returns file size in bytes.
+func FileSize(path string) (int64, error) {
+	f, err := os.Stat(path)
+	if err != nil {
+		return 0, err
+	}
+	return f.Size(), nil
+}
+
+// MTime returns file modified time.
+func MTime(filepath string) (int64, error) {
+	f, err := os.Stat(filepath)
+	if err != nil {
+		return 0, err
+	}
+	return f.ModTime().Unix(), nil
+}
+
+// Sha returns file sha value, param `shaType` should be 1, 256 or 512.
+func Sha(filepath string, shaType ...int) (string, error) {
+	file, err := os.Open(filepath)
+	if err != nil {
+		return "", err
+	}
+	defer file.Close()
+
+	h := sha1.New()
+	if len(shaType) > 0 {
+		if shaType[0] == 1 {
+			h = sha1.New()
+		} else if shaType[0] == 256 {
+			h = sha256.New()
+		} else if shaType[0] == 512 {
+			h = sha512.New()
+		} else {
+			return "", errors.New("param `shaType` should be 1, 256 or 512.")
+		}
+	}
+
+	_, err = io.Copy(h, file)
+
+	if err != nil {
+		return "", err
+	}
+
+	sha := fmt.Sprintf("%x", h.Sum(nil))
+
+	return sha, nil
+
+}
+
+// ReadCsvFile read file content into slice.
+func ReadCsvFile(filepath string, delimiter ...rune) ([][]string, error) {
+	f, err := os.Open(filepath)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+
+	reader := csv.NewReader(f)
+	if len(delimiter) > 0 {
+		reader.Comma = delimiter[0]
+	}
+
+	records, err := reader.ReadAll()
+	if err != nil {
+		return nil, err
+	}
+
+	return records, nil
+}
+
+// WriteCsvFile write content to target csv file.
+func WriteCsvFile(filepath string, records [][]string, append bool, delimiter ...rune) error {
+	flag := os.O_RDWR | os.O_CREATE
+
+	if append {
+		flag = flag | os.O_APPEND
+	}
+
+	f, err := os.OpenFile(filepath, flag, 0644)
+	if err != nil {
+		return err
+	}
+
+	defer f.Close()
+
+	writer := csv.NewWriter(f)
+	// 设置默认分隔符为逗号，除非另外指定
+	if len(delimiter) > 0 {
+		writer.Comma = delimiter[0]
+	} else {
+		writer.Comma = ','
+	}
+
+	// 遍历所有记录并处理包含分隔符或双引号的单元格
+	for i := range records {
+		for j := range records[i] {
+			records[i][j] = escapeCSVField(records[i][j], writer.Comma)
+		}
+	}
+
+	return writer.WriteAll(records)
+}
+
+// escapeCSVField 处理单元格内容，如果包含分隔符，则用双引号包裹
+func escapeCSVField(field string, delimiter rune) string {
+	// 替换所有的双引号为两个双引号
+	escapedField := strings.ReplaceAll(field, "\"", "\"\"")
+
+	// 如果字段包含分隔符、双引号或换行符，用双引号包裹整个字段
+	if strings.ContainsAny(escapedField, string(delimiter)+"\"\n") {
+		escapedField = fmt.Sprintf("\"%s\"", escapedField)
+	}
+
+	return escapedField
+}
+
+// WriteMapsToCsv write slice of map to csv file.
+// Play: https://go.dev/play/p/umAIomZFV1c
+// filepath: Path to the CSV file.
+// records: Slice of maps to be written. the value of map should be basic type.
+// the maps will be sorted by key in alphabeta order, then be written into csv file.
+// appendToExistingFile: If true, data will be appended to the file if it exists.
+// delimiter: Delimiter to use in the CSV file.
+// headers: order of the csv column headers, needs to be consistent with the key of the map.
+func WriteMapsToCsv(filepath string, records []map[string]interface{}, appendToExistingFile bool, delimiter rune, headers ...[]string) error {
+	for _, record := range records {
+		for _, value := range record {
+			if !isCsvSupportedType(value) {
+				return errors.New("unsupported value type detected; only basic types are supported: \nbool, rune, string, int, int64, float32, float64, uint, byte, complex128, complex64, uintptr")
+			}
+		}
+	}
+
+	var columnHeaders []string
+	if len(headers) > 0 {
+		columnHeaders = headers[0]
+	} else {
+		for key := range records[0] {
+			columnHeaders = append(columnHeaders, key)
+		}
+		// sort keys in alphabeta order
+		sort.Strings(columnHeaders)
+	}
+
+	var datasToWrite [][]string
+	if !appendToExistingFile {
+		datasToWrite = append(datasToWrite, columnHeaders)
+	}
+
+	for _, record := range records {
+		var row []string
+		for _, h := range columnHeaders {
+			row = append(row, fmt.Sprintf("%v", record[h]))
+		}
+		datasToWrite = append(datasToWrite, row)
+	}
+
+	return WriteCsvFile(filepath, datasToWrite, appendToExistingFile, delimiter)
+}
+
+// check if the value of map which to be written into csv is basic type.
+func isCsvSupportedType(v interface{}) bool {
+	switch v.(type) {
+	case bool, rune, string, int, int64, float32, float64, uint, byte, complex128, complex64, uintptr:
+		return true
+	default:
+		return false
+	}
+}
+
+// WriteStringToFile write string to target file.
+func WriteStringToFile(filepath string, content string, append bool) error {
+	flag := os.O_RDWR | os.O_CREATE
+	if append {
+		flag = flag | os.O_APPEND
+	}
+
+	f, err := os.OpenFile(filepath, flag, 0644)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	_, err = f.WriteString(content)
+	return err
+}
+
+// WriteBytesToFile write bytes to target file.
+func WriteBytesToFile(filepath string, content []byte) error {
+	f, err := os.OpenFile(filepath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
+	if err != nil {
+		return err
+	}
+
+	defer f.Close()
+
+	_, err = f.Write(content)
+	return err
+}
+
+// ReadFile get file reader by a url or a local file.
+func ReadFile(path string) (reader io.ReadCloser, closeFn func(), err error) {
+	switch {
+	case validator.IsUrl(path):
+		resp, err := http.Get(path)
+		if err != nil {
+			return nil, func() {}, err
+		}
+		return resp.Body, func() { resp.Body.Close() }, nil
+	case IsExist(path):
+		reader, err := os.Open(path)
+		if err != nil {
+			return nil, func() {}, err
+		}
+		return reader, func() { reader.Close() }, nil
+	default:
+		return nil, func() {}, errors.New("unknown file type")
+	}
+}
+
+// ChunkRead 从文件的指定偏移读取块并返回块内所有行
+func ChunkRead(f *os.File, offset int64, size int, bufPool *sync.Pool) []string {
+	buf := bufPool.Get().([]byte)[:size] // 从Pool获取缓冲区并调整大小
+	n, err := f.ReadAt(buf, offset)      // 从指定偏移读取数据到缓冲区
+	if err != nil && err != io.EOF {
+		log.Fatal(err)
+	}
+	buf = buf[:n] // 调整切片以匹配实际读取的字节数
+
+	var lines []string
+	var lineStart int
+	for i, b := range buf {
+		if b == '\n' {
+			line := string(buf[lineStart:i]) // 不包括换行符
+			lines = append(lines, line)
+			lineStart = i + 1 // 设置下一行的开始
+		}
+	}
+
+	if lineStart < len(buf) { // 处理块末尾的行
+		line := string(buf[lineStart:])
+		lines = append(lines, line)
+	}
+	bufPool.Put(buf) // 读取完成后，将缓冲区放回Pool
+	return lines
+}
+
+// 并行读取文件并将每个块的行发送到指定通道
+// filePath 文件路径
+// ChunkSizeMB 分块的大小（单位MB，设置为0时使用默认100MB）,设置过大反而不利，视情调整
+// MaxGoroutine 并发读取分块的数量，设置为0时使用CPU核心数
+// linesCh用于接收返回结果的通道。
+func ParallelChunkRead(filePath string, linesCh chan<- []string, ChunkSizeMB, MaxGoroutine int) {
+	if ChunkSizeMB == 0 {
+		ChunkSizeMB = 100
+	}
+	ChunkSize := ChunkSizeMB * 1024 * 1024
+	// 内存复用
+	bufPool := sync.Pool{
+		New: func() interface{} {
+			return make([]byte, 0, ChunkSize)
+		},
+	}
+
+	if MaxGoroutine == 0 {
+		MaxGoroutine = runtime.NumCPU() // 设置为0时使用CPU核心数
+	}
+
+	f, err := os.Open(filePath)
+	if err != nil {
+		log.Fatalf("failed to open file: %v", err)
+	}
+	defer f.Close()
+
+	info, err := f.Stat()
+	if err != nil {
+		log.Fatalf("failed to get file info: %v", err)
+	}
+
+	wg := sync.WaitGroup{}
+	chunkOffsetCh := make(chan int64, MaxGoroutine)
+
+	// 分配工作
+	go func() {
+		for i := int64(0); i < info.Size(); i += int64(ChunkSize) {
+			chunkOffsetCh <- i
+		}
+		close(chunkOffsetCh)
+	}()
+
+	// 启动工作协程
+	for i := 0; i < MaxGoroutine; i++ {
+		wg.Add(1)
+		go func() {
+			for chunkOffset := range chunkOffsetCh {
+				linesCh <- ChunkRead(f, chunkOffset, ChunkSize, &bufPool)
+			}
+			wg.Done()
+		}()
+	}
+
+	// 等待所有解析完成后关闭行通道
+	wg.Wait()
+	close(linesCh)
+}
--- a/fileutil/file_test.go
+++ b/fileutil/file_test.go
@@ -1,10 +1,11 @@
 package fileutil

 import (
+	"io"
 	"os"
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestIsExist(t *testing.T) {
@@ -33,6 +34,27 @@ func TestCreateFile(t *testing.T) {
 	os.Remove(f)
 }

+func TestCreateDir(t *testing.T) {
+	assert := internal.NewAssert(t, "TestCreateDir")
+
+	pwd, err := os.Getwd()
+	if err != nil {
+		t.Error(err)
+		t.FailNow()
+	}
+
+	dirPath := pwd + "/a/"
+	err = CreateDir(dirPath)
+	if err != nil {
+		t.Error(err)
+		t.FailNow()
+	}
+
+	assert.Equal(true, IsExist(dirPath))
+	os.Remove(dirPath)
+	assert.Equal(false, IsExist(dirPath))
+}
+
 func TestIsDir(t *testing.T) {
 	assert := internal.NewAssert(t, "TestIsDir")

@@ -79,7 +101,7 @@ func TestListFileNames(t *testing.T) {
 	filesInPath, err := ListFileNames("../datetime/")
 	assert.IsNil(err)

-	expected := []string{"datetime.go", "datetime_test.go"}
+	expected := []string{"conversion.go", "conversion_test.go", "datetime.go", "datetime_test.go"}
 	assert.Equal(expected, filesInPath)
 }

@@ -161,6 +183,44 @@ func TestZipAndUnZip(t *testing.T) {
 	os.RemoveAll(unZipPath)
 }

+func TestZipAppendEntry(t *testing.T) {
+	assert := internal.NewAssert(t, "TestZipAppendEntry")
+
+	zipFile := "./text.zip"
+	err := CopyFile("./testdata/file.go.zip", zipFile)
+	assert.IsNil(err)
+
+	srcFile := "./text.txt"
+	CreateFile(srcFile)
+
+	file, _ := os.OpenFile(srcFile, os.O_WRONLY|os.O_TRUNC, os.ModePerm)
+
+	_, err = file.WriteString("hello\nworld")
+	if err != nil {
+		t.Fail()
+	}
+	file.Close()
+
+	err = ZipAppendEntry(srcFile, zipFile)
+	assert.IsNil(err)
+
+	err = ZipAppendEntry("./testdata", zipFile)
+	assert.IsNil(err)
+
+	unZipPath := "./unzip"
+	err = UnZip(zipFile, unZipPath)
+	assert.IsNil(err)
+
+	assert.Equal(true, IsExist("./unzip/text.txt"))
+	assert.Equal(true, IsExist("./unzip/file.go"))
+	assert.Equal(true, IsExist("./unzip/testdata/file.go.zip"))
+	assert.Equal(true, IsExist("./unzip/testdata/test.txt"))
+
+	os.Remove(srcFile)
+	os.Remove(zipFile)
+	os.RemoveAll(unZipPath)
+}
+
 func TestFileMode(t *testing.T) {
 	assert := internal.NewAssert(t, "TestFileMode")

@@ -200,3 +260,192 @@ func TestMiMeType(t *testing.T) {
 	assert.Equal("text/plain; charset=utf-8", MiMeType(f))
 	assert.Equal("text/plain; charset=utf-8", MiMeType("./file.go"))
 }
+
+func TestCurrentPath(t *testing.T) {
+	absPath := CurrentPath()
+	t.Log(absPath)
+}
+
+func TestIsZipFile(t *testing.T) {
+	assert := internal.NewAssert(t, "TestIsZipFile")
+
+	assert.Equal(false, IsZipFile("./file.go"))
+	assert.Equal(true, IsZipFile("./testdata/file.go.zip"))
+}
+
+func TestFileSize(t *testing.T) {
+	assert := internal.NewAssert(t, "TestFileSize")
+
+	size, err := FileSize("./testdata/test.txt")
+
+	assert.IsNil(err)
+	assert.Equal(int64(20), size)
+}
+
+func TestMTime(t *testing.T) {
+	// assert := internal.NewAssert(t, "TestMTime")
+
+	// mtime, err := MTime("./testdata/test.txt")
+
+	// assert.IsNil(err)
+	// assert.Equal(int64(1682478195), mtime)
+}
+
+func TestSha(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSha")
+
+	sha1, err := Sha("./testdata/test.txt", 1)
+	assert.IsNil(err)
+
+	sha256, err := Sha("./testdata/test.txt", 256)
+	assert.IsNil(err)
+
+	sha512, err := Sha("./testdata/test.txt", 512)
+
+	assert.IsNil(err)
+	assert.Equal("dda3cf10c5a6ff6c6659a497bf7261b287af2bc7", sha1)
+	assert.Equal("aa6d0a3fbc3442c228d606da09e0c1dc98c69a1cac3da1909199e0266171df35", sha256)
+	assert.Equal("d22aba2a1b7a2e2f512756255cc1c3708905646920cb1eb95e45b531ba74774dbbb89baebf1f716220eb9cf4908f1cfc5b2a01267704d9a59f59d77cab609870", sha512)
+}
+
+func TestReadCsvFile(t *testing.T) {
+	assert := internal.NewAssert(t, "TestReadCsvFile")
+
+	content, err := ReadCsvFile("./testdata/demo.csv")
+	t.Log(content)
+
+	assert.IsNil(err)
+
+	assert.Equal(3, len(content))
+	assert.Equal(3, len(content[0]))
+	assert.Equal("Bob", content[0][0])
+}
+
+func TestWriteCsvFile(t *testing.T) {
+	assert := internal.NewAssert(t, "TestWriteCsvFile")
+
+	csvFilePath := "./testdata/test1.csv"
+	content := [][]string{
+		{"Lili", "22", "female"},
+		{"Jim", "21", "male"},
+	}
+
+	err := WriteCsvFile(csvFilePath, content, false)
+	assert.IsNil(err)
+
+	readContent, err := ReadCsvFile(csvFilePath)
+
+	assert.IsNil(err)
+
+	assert.Equal(2, len(readContent))
+	assert.Equal(3, len(readContent[0]))
+	assert.Equal("Lili", content[0][0])
+}
+
+func TestWriteMapsToCsv(t *testing.T) {
+	assert := internal.NewAssert(t, "TestWriteMapsToCSV")
+
+	csvFilePath := "./testdata/test4.csv"
+	records := []map[string]interface{}{
+		{"Name": "Lili", "Age": "22", "Gender": "female"},
+		{"Name": "Jim", "Age": "21", "Gender": "male"},
+	}
+
+	headers := []string{"Name", "Age", "Gender"}
+	err := WriteMapsToCsv(csvFilePath, records, false, ';', headers)
+
+	assert.IsNil(err)
+
+	content, err := ReadCsvFile(csvFilePath, ';')
+
+	assert.IsNil(err)
+
+	assert.Equal(3, len(content))
+	assert.Equal(3, len(content[0]))
+	assert.Equal("Lili", content[1][0])
+	assert.Equal("22", content[1][1])
+	assert.Equal("female", content[1][2])
+}
+
+func TestWriteStringToFile(t *testing.T) {
+	assert := internal.NewAssert(t, "TestWriteStringToFile")
+
+	filepath := "./test.txt"
+
+	file, err := os.Create(filepath)
+	if err != nil {
+		t.Fail()
+	}
+
+	defer file.Close()
+
+	err = WriteStringToFile(filepath, "hello", false)
+	if err != nil {
+		t.Fail()
+	}
+
+	content1, err := ReadFileToString(filepath)
+	if err != nil {
+		t.Fail()
+	}
+
+	err = WriteStringToFile(filepath, " world", true)
+	if err != nil {
+		t.Fail()
+	}
+
+	content2, err := os.ReadFile(filepath)
+	if err != nil {
+		t.Fail()
+	}
+
+	assert.Equal("hello", content1)
+	assert.Equal("hello world", string(content2))
+
+	os.Remove(filepath)
+}
+
+func TestWriteBytesToFile(t *testing.T) {
+	assert := internal.NewAssert(t, "TestWriteBytesToFile")
+
+	filepath := "./bytes.txt"
+
+	file, err := os.Create(filepath)
+	if err != nil {
+		t.Fail()
+	}
+
+	defer file.Close()
+
+	err = WriteBytesToFile(filepath, []byte("hello"))
+	if err != nil {
+		t.Fail()
+	}
+
+	content, err := os.ReadFile(filepath)
+	if err != nil {
+		t.Fail()
+	}
+
+	assert.Equal("hello", string(content))
+
+	os.Remove(filepath)
+}
+
+func TestReadFile(t *testing.T) {
+	reader, close, err := ReadFile("https://httpbin.org/robots.txt")
+	if err != nil {
+		t.Fail()
+	}
+	defer close()
+
+	dat, err := io.ReadAll(reader)
+	if err != nil {
+		t.Fail()
+	}
+
+	want := `User-agent: *
+Disallow: /deny
+`
+	internal.NewAssert(t, "TestReadFile").Equal(want, string(dat))
+}
--- a/fileutil/testdata/demo.csv
+++ b/fileutil/testdata/demo.csv
@@ -0,0 +1,3 @@
+Bob, 12, male
+Duke, 14, male
+Lucy, 16, female
--- a/fileutil/testdata/file.go.zip
+++ b/fileutil/testdata/file.go.zip
--- a/fileutil/testdata/test.txt
+++ b/fileutil/testdata/test.txt
@@ -0,0 +1 @@
+this is a test file.
--- a/fileutil/testdata/test1.csv
+++ b/fileutil/testdata/test1.csv
@@ -0,0 +1,3 @@
+Lili,22,female
+Jim,21,male
+
--- a/fileutil/testdata/test4.csv
+++ b/fileutil/testdata/test4.csv
@@ -0,0 +1,3 @@
+Name;Age;Gender
+Lili;22;female
+Jim;21;male
--- a/formatter/formatter.go
+++ b/formatter/formatter.go
@@ -4,14 +4,227 @@
 // Package formatter implements some functions to format string, struct.
 package formatter

-import "strings"
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"math"
+	"strconv"
+	"strings"
+	"unicode"

-// Comma add comma to number by every 3 numbers from right. ahead by symbol char
-func Comma(v any, symbol string) string {
-	s := numString(v)
-	dotIndex := strings.Index(s, ".")
-	if dotIndex != -1 {
-		return symbol + commaString(s[:dotIndex]) + s[dotIndex:]
+	"github.com/duke-git/lancet/convertor"
+)
+
+// Comma add comma to a number value by every 3 numbers from right. ahead by prefix symbol char.
+// if value is invalid number string eg "aa", return empty string
+// Comma("12345", "$") => "$12,345", Comma(12345, "$") => "$12,345"
+func Comma(value interface{}, prefixSymbol string) string {
+	numString := convertor.ToString(value)
+
+	_, err := strconv.ParseFloat(numString, 64)
+	if err != nil {
+		return ""
 	}
-	return symbol + commaString(s)
+
+	isNegative := strings.HasPrefix(numString, "-")
+	if isNegative {
+		numString = numString[1:]
+	}
+
+	index := strings.Index(numString, ".")
+	if index == -1 {
+		index = len(numString)
+	}
+
+	for index > 3 {
+		index -= 3
+		numString = numString[:index] + "," + numString[index:]
+	}
+
+	if isNegative {
+		numString = "-" + numString
+	}
+
+	return prefixSymbol + numString
+}
+
+// Pretty data to JSON string.
+func Pretty(v interface{}) (string, error) {
+	out, err := json.MarshalIndent(v, "", "    ")
+	return string(out), err
+}
+
+// PrettyToWriter pretty encode data to writer.
+func PrettyToWriter(v interface{}, out io.Writer) error {
+	enc := json.NewEncoder(out)
+	enc.SetIndent("", "    ")
+
+	if err := enc.Encode(v); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// http://en.wikipedia.org/wiki/Binary_prefix
+const (
+	// Decimal
+	UnitB  = 1
+	UnitKB = 1000
+	UnitMB = 1000 * UnitKB
+	UnitGB = 1000 * UnitMB
+	UnitTB = 1000 * UnitGB
+	UnitPB = 1000 * UnitTB
+	UnitEB = 1000 * UnitPB
+
+	// Binary
+	UnitBiB = 1
+	UnitKiB = 1024
+	UnitMiB = 1024 * UnitKiB
+	UnitGiB = 1024 * UnitMiB
+	UnitTiB = 1024 * UnitGiB
+	UnitPiB = 1024 * UnitTiB
+	UnitEiB = 1024 * UnitPiB
+)
+
+// type byteUnitMap map[byte]int64
+
+var (
+	decimalByteMap = map[string]uint64{
+		"b":  UnitB,
+		"kb": UnitKB,
+		"mb": UnitMB,
+		"gb": UnitGB,
+		"tb": UnitTB,
+		"pb": UnitPB,
+		"eb": UnitEB,
+
+		// Without suffix
+		"":  UnitB,
+		"k": UnitKB,
+		"m": UnitMB,
+		"g": UnitGB,
+		"t": UnitTB,
+		"p": UnitPB,
+		"e": UnitEB,
+	}
+
+	binaryByteMap = map[string]uint64{
+		"bi":  UnitBiB,
+		"kib": UnitKiB,
+		"mib": UnitMiB,
+		"gib": UnitGiB,
+		"tib": UnitTiB,
+		"pib": UnitPiB,
+		"eib": UnitEiB,
+
+		// Without suffix
+		"":   UnitBiB,
+		"ki": UnitKiB,
+		"mi": UnitMiB,
+		"gi": UnitGiB,
+		"ti": UnitTiB,
+		"pi": UnitPiB,
+		"ei": UnitEiB,
+	}
+)
+
+var (
+	decimalByteUnits = []string{"B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"}
+	binaryByteUnits  = []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"}
+)
+
+// DecimalBytes returns a human readable byte size under decimal standard (base 1000)
+// The precision parameter specifies the number of digits after the decimal point, which defaults to 4.
+// Play: https://go.dev/play/p/FPXs1suwRcs
+func DecimalBytes(size float64, precision ...int) string {
+	p := 5
+	if len(precision) > 0 {
+		p = precision[0] + 1
+	}
+	size, unit := calculateByteSize(size, 1000.0, decimalByteUnits)
+
+	return fmt.Sprintf("%.*g%s", p, size, unit)
+}
+
+// BinaryBytes returns a human-readable byte size under binary standard (base 1024)
+// The precision parameter specifies the number of digits after the decimal point, which defaults to 4.
+func BinaryBytes(size float64, precision ...int) string {
+	p := 5
+	if len(precision) > 0 {
+		p = precision[0] + 1
+	}
+	size, unit := calculateByteSize(size, 1024.0, binaryByteUnits)
+
+	return fmt.Sprintf("%.*g%s", p, size, unit)
+}
+
+func calculateByteSize(size float64, base float64, byteUnits []string) (float64, string) {
+	i := 0
+	unitsLimit := len(byteUnits) - 1
+	for size >= base && i < unitsLimit {
+		size = size / base
+		i++
+	}
+	return size, byteUnits[i]
+}
+
+// ParseDecimalBytes return the human readable bytes size string into the amount it represents(base 1000).
+// ParseDecimalBytes("42 MB") -> 42000000, nil
+func ParseDecimalBytes(size string) (uint64, error) {
+	return parseBytes(size, "decimal")
+}
+
+// ParseBinaryBytes return the human readable bytes size string into the amount it represents(base 1024).
+// ParseBinaryBytes("42 mib") -> 44040192, nil
+func ParseBinaryBytes(size string) (uint64, error) {
+	return parseBytes(size, "binary")
+}
+
+// see https://github.com/dustin/go-humanize/blob/master/bytes.go
+func parseBytes(s string, kind string) (uint64, error) {
+	lastDigit := 0
+	hasComma := false
+	for _, r := range s {
+		if !(unicode.IsDigit(r) || r == '.' || r == ',') {
+			break
+		}
+		if r == ',' {
+			hasComma = true
+		}
+		lastDigit++
+	}
+
+	num := s[:lastDigit]
+	if hasComma {
+		num = strings.Replace(num, ",", "", -1)
+	}
+
+	f, err := strconv.ParseFloat(num, 64)
+	if err != nil {
+		return 0, err
+	}
+
+	extra := strings.ToLower(strings.TrimSpace(s[lastDigit:]))
+
+	if kind == "decimal" {
+		if m, ok := decimalByteMap[extra]; ok {
+			f *= float64(m)
+			if f >= math.MaxUint64 {
+				return 0, fmt.Errorf("too large: %v", s)
+			}
+			return uint64(f), nil
+		}
+	} else {
+		if m, ok := binaryByteMap[extra]; ok {
+			f *= float64(m)
+			if f >= math.MaxUint64 {
+				return 0, fmt.Errorf("too large: %v", s)
+			}
+			return uint64(f), nil
+		}
+	}
+
+	return 0, fmt.Errorf("unhandled size name: %v", extra)
 }
--- a/formatter/formatter_internal.go
+++ b/formatter/formatter_internal.go
@@ -1,40 +0,0 @@
-package formatter
-
-import (
-	"fmt"
-	"reflect"
-	"strconv"
-	"strings"
-)
-
-func commaString(s string) string {
-	if len(s) <= 3 {
-		return s
-	}
-	return commaString(s[:len(s)-3]) + "," + commaString(s[len(s)-3:])
-}
-
-func numString(value any) string {
-	switch reflect.TypeOf(value).Kind() {
-	case reflect.Int, reflect.Int64, reflect.Float32, reflect.Float64:
-		return fmt.Sprintf("%v", value)
-	case reflect.String:
-		{
-			sv := fmt.Sprintf("%v", value)
-			if strings.Contains(sv, ".") {
-				_, err := strconv.ParseFloat(sv, 64)
-				if err == nil {
-					return sv
-				}
-			} else {
-				_, err := strconv.ParseInt(sv, 10, 64)
-				if err == nil {
-					return sv
-				}
-			}
-		}
-	default:
-		return ""
-	}
-	return ""
-}
--- a/formatter/formatter_test.go
+++ b/formatter/formatter_test.go
@@ -1,9 +1,10 @@
 package formatter

 import (
+	"bytes"
 	"testing"

-	"github.com/duke-git/lancet/v2/internal"
+	"github.com/duke-git/lancet/internal"
 )

 func TestComma(t *testing.T) {
@@ -12,12 +13,152 @@ func TestComma(t *testing.T) {
 	assert.Equal("", Comma("", ""))
 	assert.Equal("", Comma("aa", ""))
 	assert.Equal("", Comma("aa.a", ""))
-	assert.Equal("", Comma([]int{1}, ""))
 	assert.Equal("123", Comma("123", ""))
 	assert.Equal("12,345", Comma("12345", ""))
+	assert.Equal("12,345.6789", Comma("12345.6789", ""))
+	assert.Equal("123,456,789,000", Comma("123456789000", ""))
+	assert.Equal("12,345,678.9", Comma("12345678.9", ""))

 	assert.Equal("12,345", Comma(12345, ""))
 	assert.Equal("$12,345", Comma(12345, "$"))
 	assert.Equal("¥12,345", Comma(12345, "¥"))
 	assert.Equal("12,345.6789", Comma(12345.6789, ""))
+	assert.Equal("12,345.6789", Comma(+12345.6789, ""))
+	assert.Equal("12,345,678.9", Comma(12345678.9, ""))
+	assert.Equal("123,456,789,000", Comma(123456789000, ""))
+
+	assert.Equal("-999", Comma(-999, ""))
+	assert.Equal("-1,000", Comma(-1000, ""))
+	assert.Equal("-1,234,567", Comma(-1234567, ""))
+}
+
+func TestPretty(t *testing.T) {
+	assert := internal.NewAssert(t, "TestPretty")
+
+	cases := []interface{}{
+		"",
+		"abc",
+		123,
+		[]string{"a", "b", "c"},
+		map[string]int{"a": 1},
+		struct {
+			Abc int `json:"abc"`
+		}{Abc: 123},
+	}
+
+	expects := []string{
+		"\"\"",
+		`"abc"`,
+		"123",
+		"[\n    \"a\",\n    \"b\",\n    \"c\"\n]",
+		"{\n    \"a\": 1\n}",
+		"{\n    \"abc\": 123\n}",
+	}
+
+	for i, v := range cases {
+		result, err := Pretty(v)
+
+		assert.IsNil(err)
+
+		t.Log("result -> ", result)
+		assert.Equal(expects[i], result)
+	}
+}
+
+func TestPrettyToWriter(t *testing.T) {
+	assert := internal.NewAssert(t, "TestPrettyToWriter")
+
+	type User struct {
+		Name string `json:"name"`
+		Aage uint   `json:"age"`
+	}
+	user := User{Name: "King", Aage: 10000}
+
+	expects := "{\n    \"name\": \"King\",\n    \"age\": 10000\n}\n"
+
+	buf := &bytes.Buffer{}
+	err := PrettyToWriter(user, buf)
+
+	assert.IsNil(err)
+	assert.Equal(expects, buf.String())
+}
+
+func TestDecimalBytes(t *testing.T) {
+	assert := internal.NewAssert(t, "TestDecimalBytes")
+
+	assert.Equal("1KB", DecimalBytes(1000))
+	assert.Equal("1.024KB", DecimalBytes(1024))
+	assert.Equal("1.2346MB", DecimalBytes(1234567))
+	assert.Equal("1.235MB", DecimalBytes(1234567, 3))
+	assert.Equal("1.123GB", DecimalBytes(float64(1.123*UnitGB)))
+	assert.Equal("2.123TB", DecimalBytes(float64(2.123*UnitTB)))
+	assert.Equal("3.123PB", DecimalBytes(float64(3.123*UnitPB)))
+	assert.Equal("4.123EB", DecimalBytes(float64(4.123*UnitEB)))
+	assert.Equal("1EB", DecimalBytes(float64(1000*UnitPB)))
+}
+
+func TestBinaryBytes(t *testing.T) {
+	assert := internal.NewAssert(t, "TestBinaryBytes")
+
+	assert.Equal("1KiB", BinaryBytes(1024))
+	assert.Equal("1MiB", BinaryBytes(1024*1024))
+	assert.Equal("1.1774MiB", BinaryBytes(1234567))
+	assert.Equal("1.18MiB", BinaryBytes(1234567, 2))
+}
+
+func TestParseDecimalBytes(t *testing.T) {
+	assert := internal.NewAssert(t, "TestParseDecimalBytes")
+
+	cases := map[string]uint64{
+		"12":      uint64(12),
+		"12 k":    uint64(12000),
+		"12 kb":   uint64(12000),
+		"12kb":    uint64(12000),
+		"12k":     uint64(12000),
+		"12K":     uint64(12000),
+		"12KB":    uint64(12000),
+		"12 K":    uint64(12000),
+		"12 KB":   uint64(12000),
+		"12 Kb":   uint64(12000),
+		"12 kB":   uint64(12000),
+		"12.2 KB": uint64(12200),
+	}
+
+	for k, v := range cases {
+		result, err := ParseDecimalBytes(k)
+		assert.Equal(v, result)
+		assert.IsNil(err)
+	}
+
+	_, err := ParseDecimalBytes("12 AB")
+	assert.IsNotNil(err)
+}
+
+func TestParseBinaryBytes(t *testing.T) {
+	assert := internal.NewAssert(t, "TestParseBinaryBytes")
+
+	cases := map[string]uint64{
+		"12":       uint64(12),
+		"12 ki":    uint64(12288),
+		"12 kib":   uint64(12288),
+		"12kib":    uint64(12288),
+		"12ki":     uint64(12288),
+		"12KI":     uint64(12288),
+		"12KIB":    uint64(12288),
+		"12KiB":    uint64(12288),
+		"12 Ki":    uint64(12288),
+		"12 KiB":   uint64(12288),
+		"12 Kib":   uint64(12288),
+		"12 kiB":   uint64(12288),
+		"12.2 KiB": uint64(12492),
+	}
+
+	for k, v := range cases {
+		result, err := ParseBinaryBytes(k)
+		assert.Equal(v, result)
+		assert.IsNil(err)
+	}
+
+	_, err := ParseDecimalBytes("12 AB")
+	assert.IsNotNil(err)
 }
--- a/function/function.go
+++ b/function/function.go
@@ -6,15 +6,16 @@ package function

 import (
 	"reflect"
+	"sync"
 	"time"
 )

 // After creates a function that invokes func once it's called n or more times
-func After(n int, fn any) func(args ...any) []reflect.Value {
+func After(n int, fn interface{}) func(args ...interface{}) []reflect.Value {
 	// Catch programming error while constructing the closure
 	mustBeFunction(fn)

-	return func(args ...any) []reflect.Value {
+	return func(args ...interface{}) []reflect.Value {
 		n--
 		if n < 1 {
 			return unsafeInvokeFunc(fn, args...)
@@ -24,11 +25,11 @@ func After(n int, fn any) func(args ...any) []reflect.Value {
 }

 // Before creates a function that invokes func once it's called less than n times
-func Before(n int, fn any) func(args ...any) []reflect.Value {
+func Before(n int, fn interface{}) func(args ...interface{}) []reflect.Value {
 	// Catch programming error while constructing the closure
 	mustBeFunction(fn)
 	var res []reflect.Value
-	return func(args ...any) []reflect.Value {
+	return func(args ...interface{}) []reflect.Value {
 		if n > 0 {
 			res = unsafeInvokeFunc(fn, args...)
 		}
@@ -40,20 +41,20 @@ func Before(n int, fn any) func(args ...any) []reflect.Value {
 	}
 }

-// Fn is for curry function which is func(...any) any
-type Fn func(...any) any
+// Fn is for curry function which is func(...interface{}) interface{}
+type Fn func(...interface{}) interface{}

 // Curry make a curry function
-func (f Fn) Curry(i any) func(...any) any {
-	return func(values ...any) any {
-		v := append([]any{i}, values...)
+func (f Fn) Curry(i interface{}) func(...interface{}) interface{} {
+	return func(values ...interface{}) interface{} {
+		v := append([]interface{}{i}, values...)
 		return f(v...)
 	}
 }

 // Compose compose the functions from right to left
-func Compose(fnList ...func(...any) any) func(...any) any {
-	return func(s ...any) any {
+func Compose(fnList ...func(...interface{}) interface{}) func(...interface{}) interface{} {
+	return func(s ...interface{}) interface{} {
 		f := fnList[0]
 		restFn := fnList[1:]

@@ -66,7 +67,7 @@ func Compose(fnList ...func(...any) any) func(...any) any {
 }

 // Delay make the function execution after delayed time
-func Delay(delay time.Duration, fn any, args ...any) {
+func Delay(delay time.Duration, fn interface{}, args ...interface{}) {
 	// Catch programming error while constructing the closure
 	mustBeFunction(fn)

@@ -75,6 +76,7 @@ func Delay(delay time.Duration, fn any, args ...any) {
 }

 // Debounced creates a debounced function that delays invoking fn until after wait duration have elapsed since the last time the debounced function was invoked.
+// Deprecated: Use Debounce function instead.
 func Debounced(fn func(), duration time.Duration) func() {
 	// Catch programming error while constructing the closure
 	mustBeFunction(fn)
@@ -94,8 +96,76 @@ func Debounced(fn func(), duration time.Duration) func() {
 	return func() { timer.Reset(duration) }
 }

+// Debounce creates a debounced version of the provided function.
+func Debounce(fn func(), delay time.Duration) (debouncedFn func(), cancelFn func()) {
+	var (
+		timer *time.Timer
+		mu    sync.Mutex
+	)
+
+	debouncedFn = func() {
+		mu.Lock()
+		defer mu.Unlock()
+
+		if timer != nil {
+			timer.Stop()
+		}
+
+		timer = time.AfterFunc(delay, func() {
+			fn()
+		})
+	}
+
+	cancelFn = func() {
+		mu.Lock()
+		defer mu.Unlock()
+
+		if timer != nil {
+			timer.Stop()
+		}
+	}
+
+	return debouncedFn, cancelFn
+}
+
+// Throttle creates a throttled version of the provided function.
+// The returned function guarantees that it will only be invoked at most once per interval.
+func Throttle(fn func(), interval time.Duration) func() {
+	var (
+		timer   *time.Timer
+		lastRun time.Time
+		mu      sync.Mutex
+	)
+
+	return func() {
+		mu.Lock()
+		defer mu.Unlock()
+
+		now := time.Now()
+		if now.Sub(lastRun) >= interval {
+			fn()
+			lastRun = now
+			if timer != nil {
+				timer.Stop()
+				timer = nil
+			}
+		} else if timer == nil {
+			delay := interval - now.Sub(lastRun)
+
+			timer = time.AfterFunc(delay, func() {
+				mu.Lock()
+				defer mu.Unlock()
+
+				fn()
+				lastRun = time.Now()
+				timer = nil
+			})
+		}
+	}
+}
+
 // Schedule invoke function every duration time, util close the returned bool chan
-func Schedule(d time.Duration, fn any, args ...any) chan bool {
+func Schedule(d time.Duration, fn interface{}, args ...interface{}) chan bool {
 	// Catch programming error while constructing the closure
 	mustBeFunction(fn)

@@ -113,3 +183,15 @@ func Schedule(d time.Duration, fn any, args ...any) chan bool {

 	return quit
 }
+
+// Pipeline takes a list of functions and returns a function whose param will be passed into
+// the functions one by one.
+func Pipeline(funcs ...func(interface{}) interface{}) func(interface{}) interface{} {
+	return func(arg interface{}) (result interface{}) {
+		result = arg
+		for _, fn := range funcs {
+			result = fn(result)
+		}
+		return
+	}
+}
--- a/function/function_internal.go
+++ b/function/function_internal.go
@@ -5,7 +5,7 @@ import (
 	"reflect"
 )

-func invokeFunc(fn any, args ...any) []reflect.Value {
+func invokeFunc(fn interface{}, args ...interface{}) []reflect.Value {
 	fv := functionValue(fn)
 	params := make([]reflect.Value, len(args))
 	for i, item := range args {
@@ -14,7 +14,7 @@ func invokeFunc(fn any, args ...any) []reflect.Value {
 	return fv.Call(params)
 }

-func unsafeInvokeFunc(fn any, args ...any) []reflect.Value {
+func unsafeInvokeFunc(fn interface{}, args ...interface{}) []reflect.Value {
 	fv := reflect.ValueOf(fn)
 	params := make([]reflect.Value, len(args))
 	for i, item := range args {
@@ -23,7 +23,7 @@ func unsafeInvokeFunc(fn any, args ...any) []reflect.Value {
 	return fv.Call(params)
 }

-func functionValue(function any) reflect.Value {
+func functionValue(function interface{}) reflect.Value {
 	v := reflect.ValueOf(function)
 	if v.Kind() != reflect.Func {
 		panic(fmt.Sprintf("Invalid function type, value of type %T", function))
@@ -31,7 +31,7 @@ func functionValue(function any) reflect.Value {
 	return v
 }

-func mustBeFunction(function any) {
+func mustBeFunction(function interface{}) {
 	v := reflect.ValueOf(function)
 	if v.Kind() != reflect.Func {
 		panic(fmt.Sprintf("Invalid function type, value of type %T", function))
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
dudaodong	69b34faeec	update build tag	2024-12-04 19:07:58 +08:00
dudaodong	9af645606b	release v1.4.6	2024-12-04 19:02:07 +08:00
dudaodong	f58b706285	fix: fix issue #275	2024-12-04 16:37:46 +08:00
dudaodong	0f9683a764	release v1.4.5	2024-12-04 10:42:55 +08:00
dudaodong	4595a94b4c	update doc	2024-12-04 10:40:18 +08:00
dudaodong	e1e15883e9	fix: MaxInt was added only in 1.17 use instead	2024-11-27 15:09:23 +08:00
dudaodong	b4e7977feb	release v1.4.4	2024-10-09 15:16:22 +08:00
dudaodong	1d3585b22f	fix: fix bug of Comma, issue #248	2024-09-29 11:52:01 +08:00
dudaodong	2145808268	feat: add new functions in datetime and strutils	2024-09-09 14:33:15 +08:00
dudaodong	cb7ff904d9	doc: update doc	2024-09-04 10:21:46 +08:00
dudaodong	87c8799e9e	doc: update doc	2024-09-04 10:20:34 +08:00
dudaodong	c9a8c70ee6	feat: merge some new functions from v2 branch	2024-09-04 10:13:36 +08:00
dudaodong	ab2e5a3137	feat: add new functions	2024-09-03 20:25:06 +08:00
Chao Cai	b942b7a074	fix:convertor struct to map by struct ptr (#221 ) Co-authored-by: emrysechobygo <emrysechobygo@hotmail.com>	2024-05-25 20:05:38 +08:00
dudaodong	d910af24e0	release v1.4.3	2024-03-05 14:53:54 +08:00
dudaodong	5fc21330da	feat: add new functions to mathutil package	2024-03-05 10:41:07 +08:00
dudaodong	928e3a390d	feat: merge some new functions from rc branch	2024-03-04 16:36:20 +08:00
dudaodong	48519aba2b	feat: add MapToStruct	2024-02-23 10:29:46 +08:00
dudaodong	97ea636e9e	feat: add WriteMapsToCsv	2024-02-06 17:17:17 +08:00
dudaodong	f82f49a4c2	feat: add SubInBetween	2024-02-06 17:13:00 +08:00
dudaodong	0fc8733915	feat: add SubInBetween	2024-02-06 17:09:36 +08:00
dudaodong	44022c5861	refactor: refact Comma function	2024-02-06 17:09:08 +08:00
dudaodong	ec0222c5b1	refactor: refact Comma function	2024-02-06 17:06:06 +08:00
dudaodong	76b82a2fa1	release v1.4.2	2023-10-07 11:25:36 +08:00
dudaodong	d9dc2993b3	update readme file	2023-10-07 11:25:00 +08:00
dudaodong	ae42a9fdff	Merge branch 'v1' of github.com:duke-git/lancet into v1	2023-09-24 19:19:30 +08:00
dudaodong	f37e55d9f1	feat: add ReadFile	2023-09-24 19:19:09 +08:00
dudaodong	d920a51988	add tempdir	2023-09-18 10:08:19 +08:00
dudaodong	561c42a24e	feat: add rsa encrypt	2023-09-17 16:21:40 +08:00
dudaodong	12d74489d5	update doc	2023-09-17 16:12:12 +08:00
dudaodong	4959f26003	release v1.4.1	2023-07-31 16:44:44 +08:00
dudaodong	eb683a33d2	doc: update readme file	2023-07-29 16:57:57 +08:00
dudaodong	0e63489e9e	doc: update readme file	2023-07-28 17:39:36 +08:00
dudaodong	d9e318550a	feat: add new functions to datetime package	2023-07-28 17:25:13 +08:00
dudaodong	993b0e6023	feat: add Join	2023-07-27 20:14:57 +08:00
dudaodong	7cf358a0ec	fix: fix CreateDir bug	2023-07-27 18:00:56 +08:00
dudaodong	b85545c584	refactor: clean code	2023-07-27 17:58:57 +08:00
dudaodong	c3c6c92cd4	refactor: clean code	2023-07-27 17:58:40 +08:00
dudaodong	8587abc977	feat: add base64 support for cryptor package	2023-07-27 17:54:26 +08:00
dudaodong	5c01b7e675	release v1.4.0	2023-06-20 10:24:17 +08:00
dudaodong	0247ac232a	feat: add ZipAppendEntry	2023-06-20 10:23:12 +08:00
dudaodong	e77354d7ff	feat: add File upload for HttpPost	2023-06-20 10:12:23 +08:00
dudaodong	8998dc35bb	test: update TestToString	2023-06-15 14:45:12 +08:00
dudaodong	ad9fd196ce	fix: fix bug of issue#112 (ToString precision lost when conver float32 and float64)	2023-06-15 14:40:30 +08:00
dudaodong	c8a65c33a4	format code	2023-06-13 15:09:31 +08:00
dudaodong	69a797f8ed	doc: format code in doc file	2023-06-13 15:08:40 +08:00
dudaodong	1e5b69e9bf	feat: add RemoveWhiteSpace	2023-06-13 15:06:27 +08:00
dudaodong	275abcc8c2	feat: add RandUniqueIntSlice	2023-06-13 15:03:45 +08:00
dudaodong	065b3b84fe	add os_test.go	2023-06-13 15:00:40 +08:00
dudaodong	4bc43f3278	feat: add Log	2023-06-13 14:59:30 +08:00
dudaodong	f3382ceac9	feat: add WirteCsvFile	2023-06-13 14:56:43 +08:00
dudaodong	d20f8783b2	feat: add Utf8ToGbk and GbkToUtf8	2023-06-13 14:49:40 +08:00
dudaodong	8432a4e1ee	test: update TestExecCommand	2023-06-03 18:33:16 +08:00
dudaodong	5a8ff17b52	release v1.3.9	2023-06-01 10:06:48 +08:00
dudaodong	6b46a0c05c	feat: add WriteBytesToFile and WriteStringToFile	2023-05-31 17:36:12 +08:00
dudaodong	4b8b624b4c	feat: add ContainsAll and ContainsAny	2023-05-31 17:27:25 +08:00
dudaodong	f274375e62	feat: add IsWeekend	2023-05-31 17:23:47 +08:00
dudaodong	6dc017a5fa	feat: add BetweenSeconds and DayOfYear	2023-05-31 10:12:17 +08:00
dudaodong	e1fb97095d	feat: add ReplaceWithMap, Trim, SplitAndTrim, HideString	2023-05-30 14:12:56 +08:00
dudaodong	d8f5a15590	feat: add AddYear and IsLeapYear	2023-05-30 14:07:11 +08:00
dudaodong	1202ac955d	fix: fix timeFormat issue	2023-05-30 11:59:46 +08:00
dudaodong	84b2cec9b5	fix: fix PingConnected failed in win os	2023-05-30 11:58:29 +08:00
dudaodong	2d01a13787	feat: add ToInterface and CopyProperties	2023-05-30 11:54:57 +08:00
dudaodong	db9b045500	doc: add Cos, Sin, LCM, GCD function	2023-05-30 11:47:00 +08:00
dudaodong	2701bcc4d2	feat: add Cos, Sin, LCM, GCD function	2023-05-30 11:41:54 +08:00
dudaodong	b9745fd08b	fix: comment TestMTime	2023-05-30 11:02:03 +08:00
dudaodong	3b1597d6f7	fix: fix body param bug when send post request	2023-05-30 11:01:39 +08:00
dudaodong	40ab5e8f7b	release v1.3.8	2023-04-26 18:04:50 +08:00
dudaodong	cacedf2a05	doc: add document for compare package	2023-04-26 11:25:04 +08:00
dudaodong	4fc391895b	feat: add new function for fileutil package	2023-04-26 11:12:48 +08:00
dudaodong	b419319e66	doc: update doc for netutil package	2023-04-19 16:19:42 +08:00
dudaodong	db34b5f69c	update readme file	2023-04-19 15:50:01 +08:00
dudaodong	ee44526d9e	feat: move new functions from v2 version	2023-04-19 15:49:07 +08:00
dudaodong	6576b1f0cb	feat: add new function for system and strutil package	2023-04-19 14:36:33 +08:00
dudaodong	93108bafb9	feat: add option support for ExecCommand	2023-04-19 14:26:15 +08:00
dudaodong	07f5e0697f	feat: add option support for ExecCommand	2023-04-19 14:25:31 +08:00
dudaodong	4ba91d7e4c	feat: add IsPingConnected and IsTelnetConnected	2023-04-19 14:07:11 +08:00
dudaodong	ab81d9c283	fix: fix StructToUrlValues failed when tag contain omitempty	2023-03-06 17:23:54 +08:00
dudaodong	a74038466f	release v1.3.7	2023-03-01 10:04:15 +08:00
dudaodong	02daa7f6cb	doc: add new function docs	2023-02-28 15:09:05 +08:00
dudaodong	fef6fd7b9d	fix: fix issue #75	2023-02-23 11:51:26 +08:00
dudaodong	f6cd98086f	doc: add doc for Pipeline function	2023-02-23 10:52:07 +08:00
dudaodong	24eb2bbacd	doc: format all markdown doc	2023-02-23 10:36:54 +08:00
dudaodong	15c1537bf0	doc: add doc for SplitWords and WordCount	2023-02-23 10:23:38 +08:00
dudaodong	c02654559a	doc: add pad function	2023-02-23 10:19:05 +08:00
dudaodong	634ca09e8c	feat: add CopyProperties for merge properties between structs	2023-02-20 14:03:02 +08:00
dudaodong	f2e743dcf4	release v1.3.6	2023-02-16 11:56:11 +08:00
dudaodong	f8f58cae10	doc: add doc for DeepClone function	2023-02-16 11:53:28 +08:00
dudaodong	215b79140d	feat: add DeepClone	2023-02-16 11:50:11 +08:00
dudaodong	0bd675340f	fix: fix AesEcbEncrypt failed with key lenght is 24 or 32	2023-02-16 11:45:08 +08:00
dudaodong	f3d73899b1	release v1.3.5	2022-12-15 16:36:15 +08:00
dudaodong	d4a20b239a	add new function	2022-12-15 16:35:33 +08:00
dudaodong	4c28431451	fix: fix lint issue	2022-12-15 16:31:04 +08:00
dudaodong	168ed096c7	fix: fix ExecCommand bug forwindows	2022-12-15 16:29:36 +08:00
dudaodong	a060769635	clean code	2022-12-15 16:27:21 +08:00
dudaodong	0a99492cf6	feat: add IsGBK	2022-12-15 16:21:09 +08:00
dudaodong	fb3de03f37	clean document	2022-12-15 16:13:32 +08:00
dudaodong	43c2fd2a22	feat: add UpperKebabCase/UpperSnakeCase	2022-12-15 16:05:02 +08:00
dudaodong	279d0754ba	release v1.3.4	2022-11-17 16:14:42 +08:00
dudaodong	f133b32faa	fix: issue#62: fix ZipSlip bug	2022-11-17 16:14:03 +08:00
dudaodong	b98d5edbb5	release v1.3.3	2022-11-08 15:14:34 +08:00
dudaodong	9e39c31087	docs: update doc for random package	2022-11-08 15:03:42 +08:00
dudaodong	26bc40c614	feat: add new random function	2022-11-08 14:54:17 +08:00
dudaodong	76d68e326b	release v1.3.2	2022-08-31 17:05:38 +08:00
dudaodong	67b4782ac2	doc: add document for functions in netutil/http_client.go	2022-08-31 15:53:18 +08:00
dudaodong	1d8b9a2625	feat: add http client for sending http request	2022-08-31 11:49:27 +08:00
dudaodong	94ae1acc78	doc: update readme file	2022-08-29 15:31:19 +08:00
dudaodong	aece2995d6	refactor: change ReverseStr to Reverse in strutil package	2022-08-29 15:11:15 +08:00
dudaodong	f5ec5eb58d	feat: add EncodeByte and DecodeByte	2022-08-29 15:08:50 +08:00
dudaodong	d62284e9a6	feat: add IsZeroValue function	2022-08-29 14:59:36 +08:00
dudaodong	b6815224fd	release v1.3.1	2022-08-02 17:52:18 +08:00
dudaodong	5931b882ee	doc: update document for system package	2022-07-29 13:33:23 +08:00
dudaodong	f8096e3585	doc: update slice document	2022-07-29 13:31:04 +08:00
dudaodong	979381bfb7	doc: update convertor document	2022-07-29 13:28:25 +08:00
dudaodong	3e2c25f827	doc: update netutil document	2022-07-29 13:23:30 +08:00
dudaodong	2c7bcc9fbb	doc: update slice document	2022-07-29 13:17:05 +08:00
dudaodong	3a944ab12f	test: update slice unit test	2022-07-27 15:31:12 +08:00
dudaodong	387079d034	feat: os.go, add GetOsBits	2022-07-27 15:27:39 +08:00
dudaodong	33e3631b72	fix: fix aes/des cbc crypto iv bug	2022-07-27 15:26:45 +08:00
dudaodong	b3149ea619	feat: convertor.go, add ToChannel	2022-07-27 15:22:43 +08:00
dudaodong	116ff284c3	feat: net.go, add IsInternalIP, GetRequestPublicIp, EncodeUrl	2022-07-27 15:18:20 +08:00
dudaodong	0cb251f7b8	feat: add ToSlice and ToSlicePointer and AppendIfAbsent	2022-07-27 15:12:14 +08:00
dudaodong	683def2242	docs: update go version badge	2022-06-24 09:41:46 +08:00
dudaodong	d4a90f2869	release v1.3.0	2022-06-22 16:30:45 +08:00
dudaodong	be67de3b40	release v1.3.0	2022-06-22 15:58:41 +08:00
dudaodong	6898ed413e	docs: add doc for UniqueBy function	2022-06-22 15:47:48 +08:00
dudaodong	5dbdbcd651	docs: add doc for UniqueBy function	2022-06-22 15:45:29 +08:00
dudaodong	ae0facd32d	refactor: clean code for slice/slice.go	2022-06-22 14:21:45 +08:00
dudaodong	2d7e19fb87	feat: add UniqueBy function in slice.go	2022-06-22 12:00:01 +08:00
dudaodong	24d4a03227	update .gitignore file	2022-06-22 11:27:31 +08:00
dudaodong	93fb089f6e	docs: add CreateDir function for fileutil	2022-06-17 17:25:16 +08:00
dudaodong	2fe272f2ef	docs: add CreateDir function for fileutil	2022-06-17 17:22:08 +08:00
dudaodong	77859ffa15	docs: add doc for SplitEx function	2022-06-17 17:19:59 +08:00
dudaodong	f83f47df3a	feat: add SplitEx function	2022-06-17 17:13:58 +08:00
dudaodong	885c08847d	docs: add doc for function IndexOf and LastIndexOf	2022-06-17 17:11:09 +08:00
dudaodong	cc4a20751f	test: add unit test for funcation IndexOf and LastIndexOf	2022-06-17 17:02:44 +08:00
dudaodong	b0d1d39452	feat: add IndexOf and LastIndexOf function in slice.go	2022-06-17 17:01:37 +08:00
dudaodong	02fa7bc8be	docs: add doc for function Equal and EqualWithFunc	2022-06-17 16:57:42 +08:00
dudaodong	433eb63b86	feat: add EqualWith function for slice	2022-06-17 15:47:36 +08:00
dudaodong	a2541dac03	feat: add Equal function for slice	2022-06-17 15:37:36 +08:00
dudaodong	690e746811	update readme file	2022-04-29 14:50:29 +08:00
dudaodong	7cb97a26c5	release v1.2.9	2022-04-14 11:41:46 +08:00
dudaodong	39d373d37b	fix: fix http post to support multipart/form-data header	2022-04-14 11:39:21 +08:00
dudaodong	1aefd6aa12	release v1.2.8	2022-04-13 11:46:14 +08:00
dudaodong	c7aa44b8a4	fix: fix http post fucntion	2022-04-13 11:38:45 +08:00
dudaodong	0e3dc68de5	release v1.2.7	2022-03-29 10:52:55 +08:00
dudaodong	4083e75ed4	fix: fix ToBytes bug	2022-03-26 21:09:28 +08:00
dudaodong	1327eff62f	docs: add doc for unix time	2022-03-24 16:09:19 +08:00
dudaodong	eb24c37143	docs: add doc for unix time	2022-03-24 16:07:17 +08:00
dudaodong	b7a6c91064	feat: add unix date conversion	2022-03-24 16:03:57 +08:00
dudaodong	555e185871	feat: add unix date conversion	2022-03-24 16:01:41 +08:00
dudaodong	cb0efc5cc7	docs: replace path '/main' with '/v1'	2022-03-16 16:18:28 +08:00